Intermittent Call Instability After Initial Successful Testing

[BaiMoHan]

I have developed my agent code based on livekit-examples/voice-pipeline-agent-python and implemented the frontend using livekit/agents-playground. On October 16th, I successfully established a functional call flow. I can confirm that on the morning of October 17th, we conducted multiple successful call tests. However, by the evening of the 17th, I noticed that the call stability had deteriorated.

The issues manifest in the following ways:

1. Frequent fluctuations where speech is not recognized after a successful connection. The waveforms are visible on the frontend, but there are no changes in the backend logs. Occasionally, after a successful call, the system returns to normal state. I am uncertain if this is related to the livekit.cloud forwarding or any adjustments made.

2. After a successful room join, approximately 20 seconds later, the logs show "room disconnected."

3. The rtc_engine emits a warning stating "stream closed," but no other obvious errors are logged.

I have previously raised a few related issues for further reference. https://github.com/livekit/agents/issues/951 https://github.com/livekit/agents/issues/948

Thank you for your assistance!