Thanks for looking into it! This can't be the first time a lemmy instance has this issue? Did you ask other admins or devs?

I suppose you tried the obvious?

• restarting stuff
• checking if stuff is full

Don’t work for me at all

Intermittent in my experience

It does seem like certain communities don't have the issue, like the following https://lemmynsfw.com/c/celeb_stories_and_games

And I have also seen cases where somebody has an account on another instance, say Lemmy World, but when they post here, their posts show up under hot and active at the top of the community

Voyager for Android