Anders_ASUS1st issue was solved after low down the volume of bt headset while call it won't re-start now (but need to be fixed by asus team)
ok, so you're having two issues. The restart issue is know and the temporary fix is to set your BT volume to 3 out of 7. Then it won't restart.
The other issue with no media audio is new.
Can you please make a screen recording where you show me your sound settings, watch a youtube video (where you don't hear any sound through your headset) and turn the volume all the way down and then up again. In the video, the sound should be there regardless of volume or you're having some other issue