The easiest way to find out is to disable it then, under
Settings - Server - Agents - Movies - Plex Movie
and to perform the Plex Dance with one of the affected movies.
Please update to the latest Plex Server version.
The issue you have might be already fixed.
You are still on an outdated Plex server version. Please update to the latest. There is no sense in trying to debug issues which have already been fixed in a newer version.
I would try a slight rename of the file. I used to have a few title that just would no match correctly no matter what. Since I started adding the IMDB ID to the name, I have had 100% accuracy. Try the following file name:
Pokémon 3 The Movie - Spell of the Unown (2000) (tt0235679).mkv
These movies might not be classified as ‘cinema’ movies. The Plex Movie agent won’t match those.
If you do ‘Match’ manually, you will get search results from all agents, not just Plex Movie.
The search hit in the screen shot above may have come from the TheMovieDatabase agent.
Settings - Server - Network - ‘Show Advanced’ - “IPv6 support” <-- DISABLE
Restart plex server
Then try again to ‘Refresh Metadata’ of one affected movie.
Then fetch server log files again…