Wasn’t sure which section to put this under. Is it an issue with the server, the device I started to watch on, the device I finished watching on, or all.
Anyway, I started watching one on my files on my iPad. About half way through, hit pause. The next day, I used my Roku to watch the rest of the film. On-Deck correctly showed me that I was already watching, and hitting play re-started at the correct point.
After finishing the film, the next time I started Plex on my iPad, it still showed the film on-deck, as partially watched. Opening Plex on my Windows 10 also still showed partially watched.
The server runs on a Linux CentOS 7.5 system.
Cheers.