Naruto Kai broke Plex?

Are your files in mp4 / m4v containers?
These can contain embedded metadata and Plex will use the content of the “Title” meta tag, unless you change its configuration like so:
Go to

  • Settings - Server - Agents - Shows - TheTVDB

In there, grab the line ‘Local Media Assets’ with your mouse and drag it downwards, so it ends up being at the bottom of the stack of active agents.
Repeat the same under

  • Settings - Server - Agents - Shows - TheMovieDatabase
  • Settings - Server - Agents - Movies - Plex Movie
  • Settings - Server - Agents - Movies - TheMovieDatabase

Either way, try the Plex Dance