diff --git a/adapter/outboundgroup/fallback.go b/adapter/outboundgroup/fallback.go
index 1d109a644e..d1fc9bf0e6 100644
--- a/adapter/outboundgroup/fallback.go
+++ b/adapter/outboundgroup/fallback.go
@@ -93,9 +93,12 @@ func (f *Fallback) Unwrap(metadata *C.Metadata, touch bool) C.Proxy {
 }
 
 func (f *Fallback) proxies(touch bool) []C.Proxy {
-	elm, _, _ := f.single.Do(func() ([]C.Proxy, error) {
+	elm, _, shared := f.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(f.providers, touch, f.filter), nil
 	})
+	if shared && touch { // a shared fastSingle.Do() may cause providers untouched, so we touch them again
+		touchProviders(f.providers)
+	}
 
 	return elm
 }
diff --git a/adapter/outboundgroup/loadbalance.go b/adapter/outboundgroup/loadbalance.go
index 006e8e7541..2ac72ce9f1 100644
--- a/adapter/outboundgroup/loadbalance.go
+++ b/adapter/outboundgroup/loadbalance.go
@@ -188,9 +188,12 @@ func (lb *LoadBalance) Unwrap(metadata *C.Metadata, touch bool) C.Proxy {
 }
 
 func (lb *LoadBalance) proxies(touch bool) []C.Proxy {
-	elm, _, _ := lb.single.Do(func() ([]C.Proxy, error) {
+	elm, _, shared := lb.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(lb.providers, touch, lb.filter), nil
 	})
+	if shared && touch { // a shared fastSingle.Do() may cause providers untouched, so we touch them again
+		touchProviders(lb.providers)
+	}
 
 	return elm
 }