I run my CCwGTV 4K in "app only mode" and it doesn't poll my Jellyfin server much. But I've always run it in that mode. This weekend I will switch it out of app only mode and see if that changes the behavior.
Jellyfin 10.10.7 (Docker)
Ubuntu 24.04.2 LTS w/HWE
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
4x WD Red Pro 6TB CMR in RAIDZ1