Hello. I've noticed that notifications only go away if I click on the icon but do not go away even if the notification event has been dealt with in a different way.
For example, I receive an email saying that somebody has replied to a thread that I am subscribed to. I click on the email link to see the thread. I would expect the notification for this event to go away. But it does not. The notification remains there until I go to the notifications page.
Maybe this is how it's supposed to work, but I find it counterintuitive.