When I navigate the page using the back button in my browser, the non-read count on the forum main page doesn't update.
1. The number of unread threads in Numista coin catalogue is 14
2. I open the subforum
3. I open an unread topic
4. I use the back button to go back to the subforum (note: I had to refresh to update the read status, see https://en.numista.com/forum/topic150860.html)
5. The unread count is still 14. Only after I refresh the non-read count is updated.
