Thank you tom80H -
The files that have had the match fixed have not changed in location or name. They are also on a permanently fixed drive that is always on and available. Once an item has had it’s match fixed, it should not be re-indexed unless something changes, like it is moved, renamed or deleted. It’s a weird issue for sure.
The naming convention on those affected files is: [title].[year].[season].[episode].[resolution].[source].[format]