Voice playback drops or becomes silent in multi-user channels (possible libdave/DAVE issue)

[crygeo]

Hi, I believe I might be encountering an issue related to the voice layer (possibly libdave/DAVE) when using Discord.Net.

Scenario

• Bot joins a voice channel and plays TTS audio.
• With only 1 user + bot → audio works correctly.
• When another user joins while audio is playing → playback gets interrupted.
• If the bot joins a channel with multiple users already present → sometimes no audio is heard at all.

Observed behavior

• Audio pipeline (TTS → PCM → queue) works as expected.
• CreatePCMStream starts correctly.
• Audio appears to be sent, but users do not hear anything.
• In some cases, the voice WebSocket disconnects during playback.

Relevant logs

• Voice disconnected: WebSocket connection was closed
• SendAsync completed ... during successful runs
• During failure cases, the disconnect happens while writing audio

Additional notes

• The issue consistently appears in multi-user voice scenarios.
• I implemented reconnect and retry logic, but the problem persists.
• This suggests the issue might be related to how voice reconnection or encryption (DAVE/libdave) is handled internally.

Questions

1. Is this a known limitation or issue with voice + DAVE/libdave in multi-user channels?
2. Should IAudioClient handle reconnection transparently in these cases?
3. Is there a recommended way to handle voice reconnections during active playback?
4. Could voice state updates (users joining/leaving) invalidate the current audio stream?

If needed, I can provide more detailed logs and a minimal reproducible example.

Thanks in advance.