diff --git a/404.html b/404.html
index f91638b46..98859954a 100644
--- a/404.html
+++ b/404.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE --><!-- EMBER_CLI_FASTBOOT_HEAD -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -24,8 +24,8 @@
     <!-- EMBER_CLI_FASTBOOT_BODY -->
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js" integrity="sha256-qSQ1SRCNo21Lg2J4MPUjGBC53dZzp0RawdXvOQUkn+8= sha512-m9BJHDIgM/RPMz8GieqqVYf862Tx0IErRYFVovXm6XvvWGU1I3mItguH+uRJqF19Ku6LYrrT73//Gfl/3VM4hg==" ></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js" integrity="sha256-4iW0X15SyM65jgRq6wH7C3C3IsmHMIxQpLSnitghgGw= sha512-bmCFsVeHmICUBmsB/YKRZYAuqMoLQtJHbCTR1KZySiMhsoU6HpdQnA129jhNPn+On14J1NdPJnBPW3DHKNapQg==" ></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js" integrity="sha256-L97trH8rf05DARkpEj16+ENxoX4j8V2GxyV9IwmWj4U= sha512-o7GKr6Xi+RLfWPIpldkeEd9ApD8CRct5o1kC44q9/XIw13eW5r0CPNpS90D446mABAFrGCMuvkCkP75sB3SE5A==" ></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js" integrity="sha256-OV2MmRouTfEf6IQHwgdZCbnyTF8XIR+v/2ekgOKeie4= sha512-8fwcMhtMVinLWXtzwe/ZI54ZeGUKl56MiMWjaKK5SudDMv/4ZOP3fAWcPtqZddcE6mutKBv7sFh0YqiFM6efUw==" ></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js" integrity="sha256-cgQzWJwSw3DkjAHL7N31nmxnCD7THINZDhpu6pqdAwQ= sha512-OVHj74/ZEKTJVXJx3Z3J6xrsUkVMVKrYVsL/wGj+9VxtSFgJ7sMW66ewOBx8pJ+1Ly7WMjml4xfs6C55LsZeMg==" ></script>
 
     
   </body>
diff --git a/api/Task.html b/api/Task.html
index bca9a3922..350077890 100644
--- a/api/Task.html
+++ b/api/Task.html
@@ -1606,7 +1606,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/TaskFactory.html b/api/TaskFactory.html
index 6cff24ae4..a28e59400 100644
--- a/api/TaskFactory.html
+++ b/api/TaskFactory.html
@@ -2481,7 +2481,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/TaskGroup.html b/api/TaskGroup.html
index c17213663..5e81a777b 100644
--- a/api/TaskGroup.html
+++ b/api/TaskGroup.html
@@ -1285,7 +1285,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/TaskInstance.html b/api/TaskInstance.html
index 0ef3fe1b8..d11dab567 100644
--- a/api/TaskInstance.html
+++ b/api/TaskInstance.html
@@ -614,7 +614,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/TaskProperty.html b/api/TaskProperty.html
index 79c74041e..fc40c1610 100644
--- a/api/TaskProperty.html
+++ b/api/TaskProperty.html
@@ -1605,7 +1605,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/Yieldable.html b/api/Yieldable.html
index 14e6e8551..1420577f2 100644
--- a/api/Yieldable.html
+++ b/api/Yieldable.html
@@ -655,7 +655,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/YieldableState.html b/api/YieldableState.html
index 9dc3c7c84..4d3650449 100644
--- a/api/YieldableState.html
+++ b/api/YieldableState.html
@@ -727,7 +727,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/cancelable-promise-helpers.js.html b/api/cancelable-promise-helpers.js.html
index 6721dcbc1..d51312796 100644
--- a/api/cancelable-promise-helpers.js.html
+++ b/api/cancelable-promise-helpers.js.html
@@ -185,7 +185,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/external_task-factory.js.html b/api/external_task-factory.js.html
index 7160151f4..5e1fd5877 100644
--- a/api/external_task-factory.js.html
+++ b/api/external_task-factory.js.html
@@ -385,7 +385,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/external_task-instance_cancelation.js.html b/api/external_task-instance_cancelation.js.html
index 814f55a3d..c63183724 100644
--- a/api/external_task-instance_cancelation.js.html
+++ b/api/external_task-instance_cancelation.js.html
@@ -81,7 +81,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/external_task-instance_initial-state.js.html b/api/external_task-instance_initial-state.js.html
index 5eff70afd..bf73170e1 100644
--- a/api/external_task-instance_initial-state.js.html
+++ b/api/external_task-instance_initial-state.js.html
@@ -114,7 +114,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/external_yieldables.js.html b/api/external_yieldables.js.html
index a376b6112..765ebe4e5 100644
--- a/api/external_yieldables.js.html
+++ b/api/external_yieldables.js.html
@@ -400,7 +400,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/global.html b/api/global.html
index 50fddde56..3fc4d2626 100644
--- a/api/global.html
+++ b/api/global.html
@@ -4791,7 +4791,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/index.html b/api/index.html
index fb99f5501..e776f3b3c 100644
--- a/api/index.html
+++ b/api/index.html
@@ -137,7 +137,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task-decorators.js.html b/api/task-decorators.js.html
index 0ccacfcdb..63445d68e 100644
--- a/api/task-decorators.js.html
+++ b/api/task-decorators.js.html
@@ -342,7 +342,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task-group.js.html b/api/task-group.js.html
index 34604c414..e6d85ce4a 100644
--- a/api/task-group.js.html
+++ b/api/task-group.js.html
@@ -210,7 +210,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task-instance.js.html b/api/task-instance.js.html
index 090c629c1..dad7a2f02 100644
--- a/api/task-instance.js.html
+++ b/api/task-instance.js.html
@@ -319,7 +319,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task-properties.js.html b/api/task-properties.js.html
index 6f3c19b23..eb92070ac 100644
--- a/api/task-properties.js.html
+++ b/api/task-properties.js.html
@@ -331,7 +331,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task-public-api.js.html b/api/task-public-api.js.html
index 90b698a7c..1a129b0cf 100644
--- a/api/task-public-api.js.html
+++ b/api/task-public-api.js.html
@@ -202,7 +202,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/task.js.html b/api/task.js.html
index 2a1d6543b..97afc8738 100644
--- a/api/task.js.html
+++ b/api/task.js.html
@@ -401,7 +401,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/utils.js.html b/api/utils.js.html
index 345466e59..563fa0538 100644
--- a/api/utils.js.html
+++ b/api/utils.js.html
@@ -112,7 +112,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/api/wait-for.js.html b/api/wait-for.js.html
index 79f2c3ec9..6edb6712a 100644
--- a/api/wait-for.js.html
+++ b/api/wait-for.js.html
@@ -247,7 +247,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Task.html
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:58:08 GMT+0000 (Coordinated Universal Time)
+    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.2</a> on Fri Feb 21 2025 14:59:39 GMT+0000 (Coordinated Universal Time)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/assets/chunk.524.eface0038838288ab79d.js b/assets/chunk.524.b15e83a0e9c8cc0c5b78.js
similarity index 99%
rename from assets/chunk.524.eface0038838288ab79d.js
rename to assets/chunk.524.b15e83a0e9c8cc0c5b78.js
index 68983839c..faa0b3aa9 100644
--- a/assets/chunk.524.eface0038838288ab79d.js
+++ b/assets/chunk.524.b15e83a0e9c8cc0c5b78.js
@@ -38,7 +38,7 @@ return new a(this.maxConcurrency,s-this.maxConcurrency-1)}}},428:(e,t,s)=>{"use
 s.d(t,{c:()=>o})
 var n=s(104),r=s(384)
 const i=(0,r.yi)("it belongs to a 'restartable' Task that was .perform()ed again")
-class a{constructor(e){this.numToCancel=e}step(){return this.numToCancel>0?(this.numToCancel--,i):r.w1}}class o extends n.c{makeReducer(e,t){return new a(e+t-this.maxConcurrency)}}},708:(e,t,s)=>{"use strict"
+class a{constructor(e){this.numToCancel=e}step(){return this.numToCancel>0?(this.numToCancel--,i):r.w1}}class o extends n.c{makeReducer(e,t){return new a(e+t-this.maxConcurrency)}}},328:(e,t,s)=>{"use strict"
 s.d(t,{c:()=>d})
 var n=s(384)
 const r=new Map
@@ -66,7 +66,7 @@ class h{stateFor(){return l}computeFinalStates(){}}class d{constructor(e,t){this
 return Promise.all(s)}perform(e){e.onFinalize((()=>this.scheduleRefresh())),this.taskInstances.push(e),this.refresh()}scheduleRefresh(){Promise.resolve().then((()=>this.refresh()))}refresh(){let e=this.stateTrackingEnabled?new u:new h,t=new i(this.schedulerPolicy,e,this.taskInstances)
 this.taskInstances=t.process()}}},214:(e,t,s)=>{"use strict"
 s.d(t,{wF:()=>k,W9:()=>g,Au:()=>y,Mr:()=>b})
-var n=s(708),r=s(384)
+var n=s(328),r=s(384)
 const i=new class{step(){return r.w1}}
 class a{makeReducer(){return i}}var o=s(624),c=s(192),u=s(380),l=s(428),h=s(724),d=s(408),p=s(944)
 function f(e,t,s){var n
@@ -160,7 +160,7 @@ s.push((0,n.get)(e,i.value))}return a[t](...o,...s)}(0,r.assert)(`The first argu
 s.d(t,{w:()=>k})
 var n=s(58),r=s(886)
 const i=require("@ember/object/events")
-var a=s(810),o=s(760),c=s(214),u=s(52),l=s(540),h=s(536),d=s(708)
+var a=s(810),o=s(760),c=s(214),u=s(52),l=s(540),h=s(536),d=s(328)
 class p extends d.c{scheduleRefresh(){(0,o.once)(this,this.refresh)}}var f=s(632)
 let m=0
 function b(e,t,s,n,r,i){if(s&&s.length>0)for(let a=0;a<s.length;++a){let o=s[a],c="__ember_concurrency_handler_"+m++
@@ -287,8 +287,8 @@ e.exports=require("@ember/object")},810:e=>{"use strict"
 e.exports=require("@ember/object/observers")},760:e=>{"use strict"
 e.exports=require("@ember/runloop")},412:e=>{"use strict"
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-e.exports=require("rsvp")},796:(e,t,s)=>{e.exports=function(){var e=_eai_d,t=_eai_r
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+e.exports=require("rsvp")},776:(e,t,s)=>{e.exports=function(){var e=_eai_d,t=_eai_r
+function n(e){return e&&e.__esModule?e:Object.assign({default:e},e)}window.emberAutoImportDynamic=function(e){return 1===arguments.length?t("_eai_dyn_"+e):t("_eai_dynt_"+e)(Array.prototype.slice.call(arguments,1))},window.emberAutoImportSync=function(e){return t("_eai_sync_"+e)(Array.prototype.slice.call(arguments,1))},e("ember-concurrency",["ember","@ember/object","@ember/application","@ember/destroyable","@ember/runloop","rsvp","@ember/debug","@ember/object/observers"],(function(){return n(s(856))})),e("ember-concurrency/async-arrow-runtime",["@ember/debug","@ember/object","@ember/object/observers","@ember/runloop","@ember/application","@ember/destroyable","ember","rsvp"],(function(){return n(s(252))})),e("ember-concurrency/helpers/cancel-all",["@ember/component/helper","@ember/debug","@ember/object"],(function(){return n(s(84))})),e("ember-concurrency/helpers/perform",["@ember/component/helper","@ember/debug","@ember/object"],(function(){return n(s(572))})),e("ember-concurrency/helpers/task",["@ember/component/helper"],(function(){return n(s(888))})),e("ember-modifier",["@ember/application","@ember/destroyable"],(function(){return n(s(476))})),e("prismjs-glimmer",[],(function(){return n(s(296))}))}()},708:function(e,t){window._eai_r=require,window._eai_d=define},296:(e,t,s)=>{"use strict"
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 var n=Object.defineProperty,r=Object.prototype.hasOwnProperty,i=Object.getOwnPropertySymbols,a=Object.prototype.propertyIsEnumerable,o=(e,t,s)=>t in e?n(e,t,{enumerable:!0,configurable:!0,writable:!0,value:s}):e[t]=s,c=(e,t)=>{for(var s in t||(t={}))r.call(t,s)&&o(e,s,t[s])
 if(i)for(var s of i(t))a.call(t,s)&&o(e,s,t[s])
@@ -302,6 +302,6 @@ function s(n){var r=t[n]
 if(void 0!==r)return r.exports
 var i=t[n]={exports:{}}
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-var n=s(796)
+return s.d(t,{a:t}),t},s.d=(e,t)=>{for(var n in t)s.o(t,n)&&!s.o(e,n)&&Object.defineProperty(e,n,{enumerable:!0,get:t[n]})},s.o=(e,t)=>Object.prototype.hasOwnProperty.call(e,t),s.r=e=>{"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},s(708)
+var n=s(776)
 __ember_auto_import__=n})()
diff --git a/assets/chunk.92.211f9cf8621437fdf4a3.js b/assets/chunk.92.ed75a9e404aafaa88d95.js
similarity index 87%
rename from assets/chunk.92.211f9cf8621437fdf4a3.js
rename to assets/chunk.92.ed75a9e404aafaa88d95.js
index 63d068081..ced96e366 100644
--- a/assets/chunk.92.211f9cf8621437fdf4a3.js
+++ b/assets/chunk.92.ed75a9e404aafaa88d95.js
@@ -1,4 +1,4 @@
-var __ember_auto_import__;(()=>{var r,e={0:function(r,e){window._eai_r=require,window._eai_d=define},308:(r,e,o)=>{var t,i
+var __ember_auto_import__;(()=>{var r,e={708:function(r,e){window._eai_r=require,window._eai_d=define},316:(r,e,o)=>{var t,i
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 var r})))}},o={}
 function t(r){var i=o[r]
@@ -16,6 +16,6 @@ var e=(e,o)=>{var i,n,[a,_,l]=o,u=0
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 if(l)var d=l(t)}for(e&&e(o);u<a.length;u++)n=a[u],t.o(r,n)&&r[n]&&r[n][0](),r[n]=0
 return t.O(d)},o=self.webpackChunk_ember_auto_import_=self.webpackChunk_ember_auto_import_||[]
-o.forEach(e.bind(null,0)),o.push=e.bind(null,o.push.bind(o))})(),t.O(void 0,[48],(()=>t(0)))
-var i=t.O(void 0,[48],(()=>t(308)))
+o.forEach(e.bind(null,0)),o.push=e.bind(null,o.push.bind(o))})(),t.O(void 0,[48],(()=>t(708)))
+var i=t.O(void 0,[48],(()=>t(316)))
 i=t.O(i),__ember_auto_import__=i})()
diff --git a/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js b/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js
similarity index 99%
rename from assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js
rename to assets/test-app-8c935b3dfe92b71453c23671e7434d54.js
index d37c4d4a2..a2f5774e1 100644
--- a/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js
+++ b/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js
@@ -622,4 +622,4 @@ e.default=t.default.extend({setupController(){this.loopingTask.perform()},loopin
 e.default=(0,t.createTemplateFactory)({id:"NvGiVHqu",block:'[[[10,"h1"],[14,0,"timer-loop-message"],[12],[1,"foo="],[1,[30,0,["foo"]]],[13],[1,"\\n"]],[],false,[]]',moduleName:"test-app/testing-ergo/timer-loop/template.hbs",isStrictMode:!1})})),define("test-app/utils",["exports"],(function(e){Object.defineProperty(e,"__esModule",{value:!0}),e.randomWord=function(){return t[Math.floor(Math.random()*t.length)]}
 const t=["ember","tomster","swag","yolo","turbo","ajax"]})),define("test-app/config/environment",[],(function(){if("undefined"!=typeof FastBoot)return FastBoot.config("test-app")
 try{var e="test-app/config/environment",t=document.querySelector('meta[name="'+e+'"]').getAttribute("content"),n={default:JSON.parse(decodeURIComponent(t))}
-return Object.defineProperty(n,"__esModule",{value:!0}),n}catch(r){throw new Error('Could not read config from meta tag with name "'+e+'".')}})),"undefined"==typeof FastBoot&&(runningTests||require("test-app/app").default.create({name:"test-app",version:"0.0.0+b588f74a"}))
+return Object.defineProperty(n,"__esModule",{value:!0}),n}catch(r){throw new Error('Could not read config from meta tag with name "'+e+'".')}})),"undefined"==typeof FastBoot&&(runningTests||require("test-app/app").default.create({name:"test-app",version:"0.0.0+49c5d1d7"}))
diff --git a/docs/advanced/lifecycle-events/index.html b/docs/advanced/lifecycle-events/index.html
index 6fdace87e..8705beed7 100644
--- a/docs/advanced/lifecycle-events/index.html
+++ b/docs/advanced/lifecycle-events/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember792" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember792" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -270,8 +270,8 @@ <h3>Live Example</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/advanced/task-modifiers/index.html b/docs/advanced/task-modifiers/index.html
index 5c5a91429..e2620bb49 100644
--- a/docs/advanced/task-modifiers/index.html
+++ b/docs/advanced/task-modifiers/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember831" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember831" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -299,8 +299,8 @@ <h3>More about Task Modifiers</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/advanced/yieldables/index.html b/docs/advanced/yieldables/index.html
index bf9ea9e94..7ddfb80cf 100644
--- a/docs/advanced/yieldables/index.html
+++ b/docs/advanced/yieldables/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember868" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember868" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -295,8 +295,8 @@ <h3>More about Yieldables</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/cancelation/index.html b/docs/cancelation/index.html
index ab0531ac4..ce10e2e75 100644
--- a/docs/cancelation/index.html
+++ b/docs/cancelation/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember443" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember443" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -313,8 +313,8 @@ <h5>Running tasks: 0</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/child-tasks/index.html b/docs/child-tasks/index.html
index 5b71deb00..d91a53884 100644
--- a/docs/child-tasks/index.html
+++ b/docs/child-tasks/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember521" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember521" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -267,8 +267,8 @@ <h5>Waiting to start</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/derived-state/index.html b/docs/derived-state/index.html
index 3283b5f39..226fdd95b 100644
--- a/docs/derived-state/index.html
+++ b/docs/derived-state/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember558" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember558" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -708,8 +708,8 @@ <h5>doStuffRestartable
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/error-vs-cancelation/index.html b/docs/error-vs-cancelation/index.html
index 60de60cdb..cf6653022 100644
--- a/docs/error-vs-cancelation/index.html
+++ b/docs/error-vs-cancelation/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember482" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember482" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -346,8 +346,8 @@ <h4>Example</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/events/index.html b/docs/events/index.html
index 8aa830b38..7e5e3d792 100644
--- a/docs/events/index.html
+++ b/docs/events/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember596" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember596" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -368,8 +368,8 @@ <h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/examples/ajax-throttling/index.html b/docs/examples/ajax-throttling/index.html
index e68455deb..0f3ebf1d3 100644
--- a/docs/examples/ajax-throttling/index.html
+++ b/docs/examples/ajax-throttling/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember1022" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember1022" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -274,8 +274,8 @@ <h3>Live Example</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/examples/autocomplete/index.html b/docs/examples/autocomplete/index.html
index 8a46769cd..792094b54 100644
--- a/docs/examples/autocomplete/index.html
+++ b/docs/examples/autocomplete/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember943" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember943" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -297,8 +297,8 @@ <h5>Template</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/examples/increment-buttons/index.html b/docs/examples/increment-buttons/index.html
index a13c3e9a8..23f717bae 100644
--- a/docs/examples/increment-buttons/index.html
+++ b/docs/examples/increment-buttons/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember983" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember983" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -294,8 +294,8 @@ <h5>Template (button component)</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/examples/joining-tasks/index.html b/docs/examples/joining-tasks/index.html
index 2953616ce..318212e5e 100644
--- a/docs/examples/joining-tasks/index.html
+++ b/docs/examples/joining-tasks/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember1104" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember1104" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -277,8 +277,8 @@ <h5>Status: Waiting...</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/examples/loading-ui/index.html b/docs/examples/loading-ui/index.html
index 641fc44e5..2710de3e2 100644
--- a/docs/examples/loading-ui/index.html
+++ b/docs/examples/loading-ui/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember905" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember905" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -282,8 +282,8 @@ <h3>Live Example</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/faq/index.html b/docs/faq/index.html
index d6469d94e..ccba4cb51 100644
--- a/docs/faq/index.html
+++ b/docs/faq/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember709" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember709" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -381,8 +381,8 @@ <h5>Observables?</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/installation/index.html b/docs/installation/index.html
index cf156c35b..5c8f13a00 100644
--- a/docs/installation/index.html
+++ b/docs/installation/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember111" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember111" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -279,8 +279,8 @@ <h4>Typescript and Glint</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/introduction/index.html b/docs/introduction/index.html
index a557b5c92..e671ae08e 100644
--- a/docs/introduction/index.html
+++ b/docs/introduction/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember75" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember75" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -293,8 +293,8 @@ <h3>Additional Learning Resources</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/older-versions/index.html b/docs/older-versions/index.html
index e51d861e3..98eef60a3 100644
--- a/docs/older-versions/index.html
+++ b/docs/older-versions/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember186" class="ember-view active" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember186" class="ember-view active" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -256,8 +256,8 @@ <h3>Documentation for Older Versions of Ember Concurrency</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/task-concurrency-advanced/index.html b/docs/task-concurrency-advanced/index.html
index 7fea9f012..ef48cd0a4 100644
--- a/docs/task-concurrency-advanced/index.html
+++ b/docs/task-concurrency-advanced/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember751" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember751" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -336,8 +336,8 @@ <h4>keepLatest with <code>maxConcurrency: 3</code></h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/task-concurrency/index.html b/docs/task-concurrency/index.html
index cbbd17439..a3e5d2439 100644
--- a/docs/task-concurrency/index.html
+++ b/docs/task-concurrency/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember399" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember399" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -391,8 +391,8 @@ <h4 id="keepLatest">keepLatest</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/task-function-syntax/index.html b/docs/task-function-syntax/index.html
index da5b81467..ad9603a24 100644
--- a/docs/task-function-syntax/index.html
+++ b/docs/task-function-syntax/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember359" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember359" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -315,8 +315,8 @@ <h4>Classic Ember use (prior to Ember 3.10+ or non-Ember Octane)</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/testing-debugging/index.html b/docs/testing-debugging/index.html
index 3f98b9134..e5b623ec1 100644
--- a/docs/testing-debugging/index.html
+++ b/docs/testing-debugging/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember634" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember634" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -396,8 +396,8 @@ <h4>Strange errors when using as documented</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/tutorial/discussion/index.html b/docs/tutorial/discussion/index.html
index 7182b9a73..11de19935 100644
--- a/docs/tutorial/discussion/index.html
+++ b/docs/tutorial/discussion/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember272" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember272" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -303,8 +303,8 @@ <h5>Alternative: Move tricky code to an object with a long lifespan</h5>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/tutorial/index.html b/docs/tutorial/index.html
index 8d68dddfc..c28bc5698 100644
--- a/docs/tutorial/index.html
+++ b/docs/tutorial/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember223" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember223" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -549,8 +549,8 @@ <h4>Version 5: Handle Promise/Async Function Rejection</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/tutorial/refactor/index.html b/docs/tutorial/refactor/index.html
index 13c643c6c..0e59019e2 100644
--- a/docs/tutorial/refactor/index.html
+++ b/docs/tutorial/refactor/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember311" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember311" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -530,8 +530,8 @@ <h3>Conclusion</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/typescript/index.html b/docs/typescript/index.html
index 6781a614c..7b9a1aba3 100644
--- a/docs/typescript/index.html
+++ b/docs/typescript/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember672" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember672" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -309,8 +309,8 @@ <h4>Typing <code>Task</code> objects</h4>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/docs/v4-upgrade/index.html b/docs/v4-upgrade/index.html
index 7acd99d5a..5b5177ff5 100644
--- a/docs/v4-upgrade/index.html
+++ b/docs/v4-upgrade/index.html
@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
 
     
-<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2Bb588f74a%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.2%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
+<meta name="test-app/config/environment" content="%7B%22modulePrefix%22%3A%22test-app%22%2C%22environment%22%3A%22production%22%2C%22rootURL%22%3A%22%2F%22%2C%22locationType%22%3A%22history%22%2C%22EmberENV%22%3A%7B%22EXTEND_PROTOTYPES%22%3Afalse%2C%22FEATURES%22%3A%7B%7D%2C%22_APPLICATION_TEMPLATE_WRAPPER%22%3Afalse%2C%22_DEFAULT_ASYNC_OBSERVERS%22%3Atrue%2C%22_JQUERY_INTEGRATION%22%3Afalse%2C%22_TEMPLATE_ONLY_GLIMMER_COMPONENTS%22%3Atrue%7D%2C%22APP%22%3A%7B%22name%22%3A%22test-app%22%2C%22version%22%3A%220.0.0%2B49c5d1d7%22%7D%2C%22emberConcurrencyVersion%22%3A%224.0.3%22%2C%22fastboot%22%3A%7B%22hostWhitelist%22%3A%5B%7B%7D%2C%22ember-concurrency.com%22%5D%7D%7D" />
 <!-- EMBER_CLI_FASTBOOT_TITLE -->
 
     <link integrity="" rel="stylesheet" href="/assets/vendor-10d8eaf9101947f2130df71856c61a0b.css" />
@@ -28,7 +28,7 @@ <h3 style="float:left;">
         ember-concurrency
 
         <span style="font-size: 0.5em;">
-          (<a id="ember149" class="ember-view" href="/docs/older-versions">v 4.0.2</a>)
+          (<a id="ember149" class="ember-view" href="/docs/older-versions">v 4.0.3</a>)
         </span>
       </h3>
     </div>
@@ -257,8 +257,8 @@ <h3>Upgrading to Version 4</h3>
 <script type="x/boundary" id="fastboot-body-end"></script>
 
     <script src="/assets/vendor-26832b57c057261a617e93c0f9538d54.js"></script>
-<script src="/assets/chunk.524.eface0038838288ab79d.js"></script>
-    <script src="/assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js"></script>
+<script src="/assets/chunk.524.b15e83a0e9c8cc0c5b78.js"></script>
+    <script src="/assets/test-app-8c935b3dfe92b71453c23671e7434d54.js"></script>
 
     
   </body>
diff --git a/package.json b/package.json
index daa9ac5c3..0a8953cef 100644
--- a/package.json
+++ b/package.json
@@ -1 +1 @@
-{"dependencies":{"abortcontroller-polyfill":"^1.7.3","node-fetch":"^2.6.1"},"fastboot":{"appName":"test-app","config":{"test-app":{"APP":{"autoboot":false,"name":"test-app","version":"0.0.0+b588f74a"},"EmberENV":{"EXTEND_PROTOTYPES":false,"FEATURES":{},"_APPLICATION_TEMPLATE_WRAPPER":false,"_DEFAULT_ASYNC_OBSERVERS":true,"_JQUERY_INTEGRATION":false,"_TEMPLATE_ONLY_GLIMMER_COMPONENTS":true},"emberConcurrencyVersion":"4.0.2","environment":"production","fastboot":{"hostWhitelist":["/^localhost:\\d+$/","ember-concurrency.com"]},"locationType":"history","modulePrefix":"test-app","rootURL":"/"}},"hostWhitelist":["/^localhost:\\d+$/","ember-concurrency.com"],"manifest":{"appFiles":["assets/test-app-7259e564baf257f12f8a6669bc30cc6f.js","assets/test-app-fastboot-3ded1b3add394728a447b4bdf3a28207.js"],"htmlFile":"404.html","vendorFiles":["assets/vendor-26832b57c057261a617e93c0f9538d54.js","ember-fetch/fetch-fastboot-e28194c4f1288a25de407aad6f7fab09.js","assets/chunk.524.eface0038838288ab79d.js"]},"moduleWhitelist":["node-fetch","abortcontroller-polyfill","abortcontroller-polyfill/dist/cjs-ponyfill","crypto"],"schemaVersion":3}}
\ No newline at end of file
+{"dependencies":{"abortcontroller-polyfill":"^1.7.3","node-fetch":"^2.6.1"},"fastboot":{"appName":"test-app","config":{"test-app":{"APP":{"autoboot":false,"name":"test-app","version":"0.0.0+49c5d1d7"},"EmberENV":{"EXTEND_PROTOTYPES":false,"FEATURES":{},"_APPLICATION_TEMPLATE_WRAPPER":false,"_DEFAULT_ASYNC_OBSERVERS":true,"_JQUERY_INTEGRATION":false,"_TEMPLATE_ONLY_GLIMMER_COMPONENTS":true},"emberConcurrencyVersion":"4.0.3","environment":"production","fastboot":{"hostWhitelist":["/^localhost:\\d+$/","ember-concurrency.com"]},"locationType":"history","modulePrefix":"test-app","rootURL":"/"}},"hostWhitelist":["/^localhost:\\d+$/","ember-concurrency.com"],"manifest":{"appFiles":["assets/test-app-8c935b3dfe92b71453c23671e7434d54.js","assets/test-app-fastboot-3ded1b3add394728a447b4bdf3a28207.js"],"htmlFile":"404.html","vendorFiles":["assets/vendor-26832b57c057261a617e93c0f9538d54.js","ember-fetch/fetch-fastboot-e28194c4f1288a25de407aad6f7fab09.js","assets/chunk.524.b15e83a0e9c8cc0c5b78.js"]},"moduleWhitelist":["node-fetch","abortcontroller-polyfill","abortcontroller-polyfill/dist/cjs-ponyfill","crypto"],"schemaVersion":3}}
\ No newline at end of file