‘Unchanged’ doesn’t mean ‘Correct’. This is Correct:
Organization aside… The New Agent migrated the state of LMA (Local Media Assets) and if yours was on top of the stack, Plex gave your local metadata tip top priority.
Edit the Library/Advanced and disable ‘Prefer Local Metadata’.
Sometimes (very often) Plex gets a Title Field in it’s teeth and won’t let go - like an Alligator. The Plex Dance will make it open it’s mouth and drop the tennis ball:
All Steps - In Order - or it WON’T WORK.
If you’re still on the old Agents - The LMA Hack is the cure, but do fiddle with the LMA in either case. AND correct any lousy naming/structuring BEFORE doing the dance.
For TV Shows - Dance the entire Show - if at any point it refuses to cooperate with a simple Refresh Metadata after corrective measures have been taken.
Also:
Revealing the Show name and the season/episode(s) in question may reveal something more than mystery - and they can be ‘tested’ to see if there’s an issue somewhere else. At the very least, the file path can point to issues in structure that crop up ‘out of the blue’:
