I experienced the same issue. WZ game. I even quit, restarted my xbox and rejoined that same game & the issue persisted. About 5fps… choppy audio. (unplayable). Subsequent games have not had any problems
This has happened to me in the past, but not recently. Did you try hard restarting your Xbox (pressing and holding the power button until it shuts down), unplugging the console, letting it sit for about a minute or two, then plugging it back in and trying to play again?
This is an issue with the console not doing something properly when booting the game. I had this exact thing happen with Destiny 2 one time. 5fos, choppy slow distorted audio everywhere I went. Only closing the game and hard rebooting the Xbox resolved it. Could be a rare memory leak occurrence but who knows.