Another user on another post commented that turning on looping for their m3u tuner config fixed recording for them. Not sure why that would change anything, but it worked for them.
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