Apple TV 4K audio sync issues with enhanced player

[Havohej]

There is some hope because a user discovered the problems might be related to overheating:

Plex 4K HDR Stuttering on AppleTV is Thermal Throttling

Plex Stutters when playing 4K HDR files via Direct Play on AppleTV. On all three revisions of the AppleTV 4K. Even with gigabit ethernet connection. It’s intermittent, hard for Plex to reproduce. Often the first 20min or so of a file will work fine, but then it starts to drop frames. The cause is thermal throttling from excessive CPU load. Which actually explains all the weirdness we’re seeing. We’ve been facing this issue for years. I’ve read so many threads, here and on reddit…

https://www.reddit.com/r/PleX/comments/174enui/plex_4k_hdr_stuttering_on_appletv_is_thermal/

(Not directly related to the sync problem, but potentially related)