I still don’t really understand how the fediverse interacts very well, so this might be something basic. When I access this post through the original lemmy.world, there are (currently) 44 comments showing, but when I access it through lemmy.zip, only 9 comments show up. This entire comment thread, for example, doesn’t appear through .zip. When I go to that thread’s OP’s profile through .zip, the comment is missing there as well.
As far as I know we’re not defederated from lemmy.world, but that’s the only reason I was aware of that a user’s comments might not appear. Does it have to do with the fact that it’s a new instance or something?
No worries :)
I think the easiest way to summarise federation is to think of email - the servers email each other for each action that happens, but when the server doesn’t work properly, that email doesn’t get sent and you end up with situations like this unfortunately.