This was today one of rows in my watchlist:
(rozdíl | historie) . . D Five Nights at Freddy's 3 (Q18671654); 12:08 . . Jvs (diskuse | příspěvky) (Odkaz na tuto stránku byl z Wikidat odstraněn. Mezijazykové odkazy odstraněny.)
There wouldn't be anything wrong if the watched item (Five Nights...) wasn't connected to Q18913274 (ie. I was notified about an action in another item which even isn't on my watchlist).
See also today's IRC log how to reproduce it.