Posts not showing when over 25 posts are made in thread

I set the number of threads to 50 (the maximum) on the Threads page. But when I click on the time indicator to the utter right of a thread-line when there are more than 25 posts in the thread I see the following message:

It appears that any number above 10 posts for the post limit will induce this error.

Can reproduce the same.

The issue seems to be the page# calculation. A larger number of posts per page means there will be less pages, however the "latest" link is converted to an url pointing to a page# that fits the old page-length.
E.g. The link

https://dprevived.com/t/the-beginners-questions-area/1706/last/

is converted to

https://dprevived.com/t/the-beginners-questions-area/1706/38/#post-32521

Which points to page 38.
However, because I have set 20 posts per page, there are only 34 pages.

edit: Picking 10 posts per page creates another problem. The last link points to page 38 while there are now 68 pages, so "last" leads to nowhere near the last post.
The original # of posts per page was 18, but that can't be chosen from the dropdown list. I'll try a cookie removal to see if that reverts me to default.
edit2: a cookie removal fixed it, not touching that option for the time being :)

@Propheticus

Indeed, page number issue, good catch. Clearing the cookie fixed it for me too.