Replying to topic creates mystery page...?

I'm trying to reply to a topic, but when I post it says it's on "Page 5 of 4" and doesn't show the post?!

See: https://www.fakku.net/viewtopic.php?p=1781594#1781594

But it's not really in the topic: https://www.fakku.net/viewtopic.php?p=178159

it is an old page bug.
if another user bump there, it would be fixed.

it happens a lot on thread with a lot of pages and getting worst if it reachs 100's plus pages