Old posts lost/no longer visible?

I have read some old threads from 2014 and before and a recurrent theme is some posts are completely blank? Just check any thread from 2014(maybe later) or before that have enough posts and you see this problem. Is this something that can be fixed? Thanks.

example blackhatworld dot com/seo/how-long-did-you-not-make-any-money.654922/page-3 1st post on that page is lost.

This is a known issue - It has something to do with the update.

https://www.blackhatworld.com/seo/upgrade-stage-1-tell-us-what-you-think.428145/