Google the past few weeks is complaining about
URL errors .
Figured out that the content of e.g
some.forum.com/topic-title/topic-number?page=4 contains 20 posts, from 60th to 80th.
So assuming that this topic has 61 posts, Google “detects” a
some.forum.com/topic-title/topic-number?page=5 url, thus a 404 page.
What I was not able to figure out is when and why this is happening, because it does not happen for all topics but for quite a few of them.
Is this a known issue ?