7 hours ago
Cohabitating books and audiobooks may be part of the issue. The main issue is that you're using subfolders. If the FLAC files are in the same directory as the PDF, you might have better luck.
Jellyfin 10.10.7 LSIO Docker | Ubuntu 24.04 LTS | i7-13700K | Arc A380 6 GB | 64 GB RAM | 79 TB Storage