I’ve had this issue for many months but have been unable to replicate it until now.
Audio will randomly stop when on Bluetooth. Phone will be either locked in my pocket (frustrating when on a motorbike!), or isolated on a table.
Pressing play/pause/forward in Symfonium is still functional but no audio is heard. Symfonium must restarted for audio to continue. I originally thought it was my phone, but other audio applications continue to work.
The log tracks wifi changes but I doubt this is that.
This really sounds like a BT issue on your phone, restarting the app (or reseting the player by changing some settings or casting) just triggers a restart of the AudioTrack and your phone probably start using the proper BT path again.
Well in the logs I see that the OS sends a lot of headset plug / unplug events.
Uncheck headphone auto play in the settings so that the app stops doing the play pause stuff. But this is not normal that the OS sends those events so it might still have some other issues happening outside of control of the app is Android change it’s routes or do other things internally on those events.