Today I got it for two times, that the speakers got unmuted even with headphones plugged in. I unplugged it and plugged them in again and the problem was gone. Later on it happend again with another App. The Quest was in standby and not restarted. For now I did a reeboot. Hopefully it was just a random glitch since I haven't noticed that behavior before. Anybody else experienced that?
It looks like the App Walkabout Mini Golf is the culprit ? Found another user in my Facebook group he had this effect after that game. This was it happened the first time in my case too ?