Thread:Sannse/@comment-11353776-20150507093726/@comment-1038387-20150507104824

If you encounter a bug, send it to Special:Contact/bug.

As for this problem, I've got it too, and I've seen others describe it too. It's apparently been reported already. Basically, the notification bubble doesn't change on the page you view the message on. If you go to a different tab or window, it's gone.