I had a weird audio bug yesterday. But tbh I'm not sure if it was down to the game or the Xbox UI. My snap settings have it so when something is snapped, the main window is completely silent with the snap 100% volume. This is so when I snap YouTube/TV for whatever reason it isn't drowned out by pew pew (Loot cave anyone?).
A couple of times yesterday, when I snapped something and then closed the snap, the audio didn't go back to normal. I had to open TV full screen and then go home and open up the beta again.