Due to your naming - and that embedded Title Field that Plex is preferring - which is the same as that crappy file name - Plex has probably Mismatched it and it’s now Merged with another Movie… since Plex couldn’t identify it by that crappy file name. <— and guessed wrong.
The Slow Way:
Go to the Movie Library in question. Filter for Duplicates. Hunt down Summer Rental, Split, then Fix Match on it.
The Fast Way:
Remove Summer Rental from the Library.
Name it properly.
Remove the Embedded Title Field - or deny Plex the ability to read it (see below).
Here’s how Filebot named mine - for an instant, first time match:
The LMA Hack - Old Agents:
The LMA Hack - New Agent:
Edit the Library/Advanced/Disable: Prefer Local Metadata - like I have (new TV Show Agent in a testing library):
For the record - I don’t have issues like this:
FileBot: https://www.filebot.net/ <—creates a perfect file name 'cause it goes to their database and uses they name they use and I have denied Plex’s ability to peer inside my MP4/M4V files to prefer a Bogus Name buried in the file that bears little in common with the real file name required.
The Plex Dance is highly recommended at this point - 'cause we never know what Plex is going to hang on to like it’s life depended on it: Plex can’t hang onto something if it’s Bundle is gone:
