Deleted movies remain in Watchlists

My movies a on a SMB share and Infuse automatically updates its library using this share.
If you add a movie to a watchlist and later, after watching, delete the movie from the SMB share, the library of infuse is updated correctly. The movie is removed from the library., but it remains on all watchlists it was added to.

the update process which removes the movie from the library should also check if deleted movies are linked to wachlists and remove those links as well.