Can you stop jellyfin, delete network.xml, and start jellyfin? It will regenerate the file with defaults. A couple other people weird network issues and deleting this file helped them.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)