Microphone plays its buffer in an infinite loop on Android when re-enabled

[goatchurchprime]

Tested versions

4.3.rc2

System information

Android version 13

Issue description

AudioStreamMicrophone can play its buffer in an infinite loop when it has been turned off and then turned back on. I used to encounter this intermittently, but it is now completely reproducible in a small project.

I tried it in v4.2.1.stable, but here it just keeps switching off after less than a second, so is probably this issue: #86428 The switching off still happens in v4.3.rc2 but not so quickly.

The following video was recorded off my Android phone as a demo.
https://github.com/user-attachments/assets/bfeea975-3386-4d54-a8ea-9941cf62b250

Steps to reproduce

Make an AudioStreamPlayer with an AudioStreamMicrophone, set to Autoplay. Then while it's running call stop() and then play() and the output to the Bus will be a ~0.5second loop of a fragment of recording. (Only happens on Android.)

Minimal reproduction project (MRP)

lipsyncapp2.zip

[goatchurchprime]

This bug also manifests in the Quest2 VR headset (which is Android based), but takes a few minutes to go wrong (so I'd hoped it didn't have this problem).

This is a show-stopper for the two-voip plugin, which is intended for multiplayer VR.

[goatchurchprime]

According to the source code https://github.com/godotengine/godot/blob/master/platform/android/audio_driver_opensl.cpp#L257 the ring buffer receiving microphone input is 2048 frames, which at 44100Hz is only 0.04 seconds. The looping bug sounds close to 4 times a second, so can't be caused by this ring buffer. (I've not been able to find if other android applications have had this problem with reading the microphone.)