I don't see how the remux would have changed the video range. Also, all the DV metadata is gone. I will research this and get back to you. Definitely strange.
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)