This might be a temporary PC-only solution, but I found this Reddit post where most PNGTube apps are being blocked by antivirus programs. Even after going through and manually adding PNGTuber Remix as an allowed app, on top of running it as an administrator, it's still intermittently disconnecting from my experience. The only other thing that I could think of that might be causing it is a Godot bug that can't handle more than two channels IIRC please don't lynch me for getting it wrong /hj so maybe going into your PC's settings and changing up how it catches your mic could also fix it? There's also the janky PNGTuber+ workaround where you edit the settings file directly to decrease the "secondsToMicReset" variable.