I remember there was in the past year (+?) a thread concerning scraping methods, their updates, flaws etc, I can’t find it now. The same issue was raised but the answer then was “not all shows have been moved ot the new one yet”
In any case, it’s been weird for a while, IE https://trakt.tv/shows/half-in-the-bag
It says scrape from TVDB, but when I select refresh, even hours and hours after tvdb is updated, and the trakt “update time” is updated, the new episodes are not showing up. I’ve seen similar weird things on other show too, mainstream shows etc also.