[xwiki-users] Watchlist feature not working

Hi, there is something wrong in the state of Denmark...: On each page I visit in our XWiki the watch feature is already activated (yellow star). And if I manually deactivate it and reactivate then it does not appear in my watchlist. So I am not at all able to add pages or spaces into my watchlist. Is this a common bug, or a misconfiguration? I would really appreciate your help as I urgently need this feature. Thanks and bests, Moritz