Periodically disappear comments in Mod X tickets, a circus with a cache?

Question

CMS

Hello, the problem is this, the site has tickets and comments to them, they are displayed on the site itself and in the general list of comments too. But in the admin panel, when we go to the question itself, they either appear or disappear, what is the reason for this? General

list : skrinshoter.ru/p/040320/owcocx
_ _
_ also tried.