I have two relatively recent Disney DVD backups that refuse to play on my frontend. This system runs LibreElec on an (albeit old) Nvidia ION box. I had Libre 8.0.2 but also updated to and tested with 8.2.5. Same result on both versions. Affected movies play fine on my Windows PC running the same version of Kodi (tested both 17.3 and 17.6.) Both frontends (Windows and Ion) access via SMB share on an Ubuntu server.
I enabled debug logging at 23:43:53 log time and attempted to play Cars 3. The Kodi menu stays on-screen, unchanged, but the playback timer starts. The timer continues to run but no movie. I can still move about the menus and pushing the stop button kills the playback timer. Also tested on Cars 2 and the movie plays normally. SW The Last Jedi also broken in the same way. All movies are stored the same way - raw DVD folders. I've reviewed permissions on the server and everything seems correct.
Because the Windows PC plays it, I can't really implicate Kodi or the movies as problems. Other DVDs work so there's nothing wrong with this system in general - ie drivers, SMB, libdvd, etc. Rather stumped at this point what the problem is. Maybe another set of eyes will spot something I missed.
23:40:28 - Successfully played Cars 2
23:43:53 - Enable debug logging
23:44:01 - Fail to play Cars 3 with debug
23:44:36 - Debug logging disabled