I mostly play on mouse and keyboard but last week I started playing Tomb Rider, for which I prefer the controller. A few times Stadia (on chromecast) has booted up with no sound at all. I first thought it was just the earphone connection but today the same problem arose with the tv too. To get the sound back I have rebooted the entire system and that usually works. There are no other problems with the sound once it is on.