Hot ranking was identified as a problematically slow query in https://github.com/LemmyNet/lemmy/issues/2877. Maybe it's possible that it's timing out on the postgres backend and you're getting partial results.
I see you're a fellow lemmy.world
user, you could crosspost to !lemmworld@lemmy.world and possibly at-mention Ruud or one of the new admins listed in https://lemmy.world/post/28012 to see if they anything funky going on in the logs.
My prediction is that there's nothing you can do about this personally, though, other than report it to admins and provide any information they request.