If I manually copy the file outside of Plex for Sunday TODAY with Willie Geist (for example), Plex can’t find a match from TheTVDB. However, it is available before hand from Gracenotes.
Please don’t report bugs as feature requests
But it’s not a bug. When I manually add content to Plex and then manually fix a mismatch, I’d like the option to use a metadata agent which isn’t a choice (Gracenotes).