Please mention whether you’re on stable, beta, or a different update channel. There’s a good chance most bugs on the stable update channel have been fixed already, so anyone on the beta update can let people know if the bug they’re facing is already fixed.
Yes it is not Deck specific, but Linux specific. It works on Windows / Android /IOS. And contrary to any other Linux installation, the deck is a commercial product. As a commercial product I want modern Headsets to work properly as they do on other systems. Proper Audio I/O is necessary for any multiplayer game.