I have discovered a bug that can cause this when “Prefer local metadata” is enabled on the library.
If you have this library setting enabled, please make sure you actually need it enabled. If you don’t curate your own metadata tags inside the media files there is no reason to use this option. Disabling this option and refreshing the metadata should resolve your issue.
A fix for the case where “Prefer local metadata” is required will be in a future PMS update at some point. A work-around for now is to do a Plex Dance on the problem show.
