FYI, I ran a quick test, renaming some MKV files to match Top Shot episodes. Plex correctly identified and displayed the episodes.
I’m running PMS 1.14.1.5488 on a Synology DS918+.
Check how your agents are configured. Picture of mine below. Might try dragging TheTVDB to the top of the list. The files I used have no local metadata, so having Local Media Assets (TV) at the top was not a problem. You’ll need to manually refresh the metadata if you change agent order.
Also, you’ll need to Plex Dance any episodes if you change the name (add/remove episode name, etc).