Paged browsing inconsistency

Let's say I get to page 5 on my feed and i go to the comments of a post. Then I leave the app. When I come back to the app, and back out of the comment section I was in, it's as though I'm on page 1, all the content from page 1 is visible. But it still says I'm on page 5. This doesn't happen all the time. This has been going on a while, I just didn't know how to report/document it.