I started a thread about this back in June ’23 and it still hasn’t been fixed. From my brief testing, the beta version’s AirPlay audio output is also quite unreliable (even though this particular issue seems to be resolved), so at this point the most practical solution is to use a different app on Apple TV.
I was thinking about re-downloading infuse, but it’s really poor from Plex considering all the people who have payed for a lifetime Plex pass and these issues are still not resolved.