Watchlist missing a film which should be showing

Update: The watchlist righted itself without me doing anything and is showing the correct number again now, thankfully. I would be interested to know whether anyone else has encountered this though and what causes it, in case it happens again. Hello. My watchlist has developed a strange issue today and I was hoping to solve it. I have attached a screenshot to illustrate the problem. I've never had this happen before, with the (of xxxx). I just wanted to know how can I see which film it is not showing, or fix it? Thank you