[Kriemfield]

Oh man, you have found the culprit, thanks!
I was closing the window too quickly in my tests. Waiting a few seconds seems to have solved the problem. Now it stays on the last page where I stayed for a short duration. The change made me confused, sorry!
However, as said in my edit before I saw your reply, the "previous page" and "next page" buttons don't seem to work, now that I have tested them with all this. I click on them and nothing happens.

Edit: After a few tries, it is just me being too quick! Everything works fine, thanks again for your hard work!