I have been having somethign similar since the new update, every now and then the Audio will just cut out, and then it will crash, or if i try to exit the game before crash it will crash on exit. but the audio being completely muted is the sign its happening.

Its not just crashing too it freezes my entire operating system. Its only on valheim though. So its my assumption its coming from valheim., Could be wrong. but its only valheim and its never happened on valheim before.