I have just recently ran into an issue. I currently have 3 movies I have identified as being in the folder with many other movies on my NAS but plex does not show them in my library. I had the movie Creed II for over a year and recently got the movie Rocky II loaded. Creed II no longer showed up in my Library. Rocky II had Creed II’s poster as the image, I went and changed this to represent the real movie. I went on my NAS from my computer (not using plex) and I can play both. I then switched the name of Creed II slightly and now Creed II shows up with Rocky II poster. Rocky II is no longer in my plex library. I can still play both directly from the NAS as an MP4 using windows media player.
This same thing happened to The Avengers (first movie) when I loaded a few other Avenger movies. I loaded WW and WW 1984 and both show up in windows explorer but only WW 1984 is in the library. I have played with the names and even moved them in different folders and so far nothing unless I make some other movie have issues.
I am a bit lost where to turn, as a note I currently have over 600 movies in my library. I don’t think there is a limit to how many except maybe disk space but I have over 10 TB of free space. Any ideas are appreciated.