Aug 6 2015
Please ignore my last comment. Bug is fixed.
Aug 5 2015
Jul 23 2015
I suspect the problem happens when one switches to wiki language on a page using flow.
And yet another example: https://he.wikipedia.org/w/index.php?title=%D7%A0%D7%95%D7%A9%D7%90:Sl2amtufzozs6xi7&topic_postId=sl725n16l4s7gzpj&topic_revId=sl725n16l4s7gzpj&action=single-view. In this case, not only that the link disappeared, it also allowed me to save an empty comment (note that the comment was later edited by [[user:IKhitron|]] in a way that made the link reappear.
Apr 13 2015
Same behaviour is observed here: [https://www.mediawiki.org/wiki/Topic:Sfbeuutut6978nus]
I am not sure this is the same as T85064. The description of T85064 says: "If I go to the Board itself, then the Notification '''is''' marked as read". I might get the terminology wrong, but I don't think this happens for me.
Apr 12 2015
Sorry if this a duplicate. I tried to search for something similar but the search engine is not very friendly.