Server Version#: 1.22.0.4163
There has been a much discussed bug in Plex that if you have a library that contains both personal media and movies, Plex will overwrite any changes you have made to the “Title” (even if the field “lock” is set) for media that it was unable to match. In other words, it does not respect the field “lock”, and it continually changes the title BACK to the filename any time that the library is re-scanned. This defies logic to me (what is the purpose of even having the field lock), but I eventually found a work-around. I could manually match the video, and select “Personal Media” from “Auto Match” pull down menu. I could then rename the “Title” and it would “stick”, even after a re-scan.
However, with the latest version of Plex (1.22.0.4163), I no longer have the option to select “Personal Media” from the Auto Match dropdown, I only have the “Plex Movie” option available. This is a huge problem for me since I have several libraries that contain “matchable” and “unmatchable” content. I used to waste a lot of time renaming titles after a rescan, but I was satisfied with the work-around that I eventually found. Now even that work-around does not work.