Can you make a backup of your Jellyfin data and try upgrading to at least 10.8.13? I vaguely recall there being quite a few jellyfin-web bugs resembling this.
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