Server Version#: 1.21.1.3830 on a Synology NAS
Player Version#: 7.11 (22422) on tvOS 14.3 (18K561) on Apple TV 4K 32GB
What I do: I have my Apple TV 4K set to the default sleep time of 15 minutes, with the screen saver coming on after 5 minutes. When I’m playing a long audio track (eg: 20 minutes), the Apple TV will first go to screensaver and then go to sleep, cutting off the music.
What I would expect: The Apple TV will keep playing music and displaying the cover art in Plex without going to sleep.
What happens: The Apple TV goes to sleep while playing music, interrupting the playback.