For the second time, i saw what i think to be a bug in superuser(i don't know if it doesn't happens in other SE sites).

I can see the title of the page where i am with a "(n)"(by n, i mean a number). It should mean that there is a notification. But when im going to check there is no notification.

The notification takes about a minute to reach the "Stack Exchange" button, after reaches the tab title.

Is this the normal behaviour, or it shouldn't happen?
(This time, it was just a badge)