Search jumping pages

I have noticed this issue before, and it occurs only in some threads and not other, occasionally.

I was in the (What Are You Working On) thread, I can see the last page, (3372) but if I try to go to the previous page (3371) it jumps back to page (1671). I can select and see any page prior to 1671, but no pages between 1671 and 3372.

It is only occurring with this thread. As I said it has happened before with other threads but goes away after a few days.

I don’t think it is my computer, as it is only this thread. Any other reports of this issue? Running Win10, updated with Chrome.