Instead of deleting /config, you could make a backup so you could restore if it a fresh Jellyfin setup doesn't resolve the issue (I don't see why it would).
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