Plex-Media-Server not updating movies

Hi all,

Since yesterday, I am having an issue with my share in Plex-Media-Server.  I have always added movies to my folder and Plex updates itself, to show the new movies.  Since having added movies, it does not want to update the library.  Not even after giving the command to scan the entire library.  I have 914 movies in the library, but it doesn't want to update - also tried refreshing all the metadata. All my movies are named "moviename (year) resolution.ext" with an .nfo file with a link to themoviedb for the movie and a jpeg with the movieposter, each movie is in it's own folder, except for collection sets (Harry Potter, Lord of the Rings, The Hobbit, Fast and Furious, etc).

To do a test, I have made a new library in my Plex, which is pointing to the same directory as the one described above and the new movies do pop up there.  Strange thing is, it tells me there are 853 movies in there (vs 914 in the original).  Because I thought this was very strange, I made another exact library, and in that one, I get 635 movies... Should all be the same number of movies, no? They should all be set up with the same movie scanner and agent as far as I'm aware.

Ideally I would want to keep "library 1 / the original", as that knows which movies I have seen and which not yet and get it to update with the new movies.

I am using a docker "Plex-Media-Server" since a few months now, ever since I was having issues with the Binhex-Plex docker (which is disabled/not running at the moment). (the docker container is up-to-date too obviously).

Hope someone can help, as I didn't find the answer on the forum.

Thanks in advance,

Best regards,

DrBobke