Watched icon remains when folder has own artwork

Hey all,

Not sure if this has been posted before. Apologies if it has.

When Infuse won’t pull through artwork from TVDB, I’ve added artwork from TVDB itself to the show’s folder. However, when I do this, the watched icon remains on unwatched regardless of whether I’ve watched it or not. I’ve tried to “Mark as Watched” but icon still says unwatched.

Some shows this has happened to;
Harper’s Island
Prehistoric Planet
Marvel’s Daredevil
The Leftovers
Why Didn’t They Ask Evans?

Any suggestions?