Yeah, that sounds like -- at least part of -- the issue. You can try changing the library folders (Dashboard > Libraries) to the lower-case versions and rescanning, though it may cause a full rescan and metadata pull. If you don't really care about case, change it back and rescan.
Jellyfin 10.10.7 LSIO Docker | Ubuntu 24.04 LTS | i7-13700K | Arc A380 6 GB | 64 GB RAM | 79 TB Storage
![[Image: AIL4fc84QG6uSnTDEZiCCtosg7uAA8x9j1myFaFs...qL0Q=w2400]](https://lh3.googleusercontent.com/pw/AIL4fc84QG6uSnTDEZiCCtosg7uAA8x9j1myFaFsx_0wM5mKgTleZb466r4NtOHIRePq_CxyhsB72qsd-xuYFkqCGogLltAMN62BXsm-yFsSZcDuryqL0Q=w2400)