To reproduce the issue:

1. Run npm install.
2. In demo.js, set the projectId constant to a valid Google Cloud project ID.
3. Run node demo.js.

You'll the notice the messages are out of order:

log: 1.405s Got event 'SPEECH_ACTIVITY_BEGIN'.
log: 2.002s 2 second mark - this should appear before 'SPEECH_ACTIVITY_BEGIN'.
log: 8.524s Got event 'SPEECH_EVENT_TYPE_UNSPECIFIED'.

They should appear in this order:

log: 2.003s 2 second mark - this should appear before 'SPEECH_ACTIVITY_BEGIN'.
log: 5.190s Got event 'SPEECH_ACTIVITY_BEGIN'.
log: 8.583s Got event 'SPEECH_EVENT_TYPE_UNSPECIFIED'.