Just looking at this post as an example, on lemmy.world show it has 29 comments, but when i open it, there are now only 3 or 4. I replied to one comment, the user i replied to got banned, and the whole comment tree is gone from lemmy.world. Other instances still show all comments, including those from the banned user and my reply. I think it’s very confusing when a single post appears with different comments on different instances, and have no idea how this works.
Edit: why am i forced to upload a photo for a new post?
Yes, i know i can host my own instance. But I don’t think that should be necessary. My ‘problem’ is that a single post is looking different on each of the instances I signed up to, and the community in question is not on any of those instances. That is confusing me. I get that any instance can block other instances, or specific communities on other instances, and that’s a good thing. But selective federation at the level of posts or comments is an extra complication in the user experience i wasn’t aware of. I thought a post, with all its comments, would either show up in its entirety or not at all. That is clearly not the case.