I found the following error also in your logs, though scanning the forums I couldn’t find a resolution or if it is actually an issue:
Apr 04, 2020 20:00:29.898 [0x7fc2337fe700] ERROR - [Notify] Failed to remove watcher (22: Invalid argument)
Apr 04, 2020 20:00:29.898 [0x7fc2337fe700] ERROR - Failed to remove watch for “/mnt/tvdisk/plex/movies/Harry Potter and the Deathly Hallows Part 2 (2011)” (22)
Is /mnt/tvdisk/plex/movies the folder you deleted? Is /mnt/tvdisk a mount from a NAS or other external storage?
A couple of suggestions to try if you haven’t already… optimize your database, and perform the Plex Dance.
