~~Can you send us an example of such a post as you are talking about? B/c I am not seeing it.~~ (Edit: oops that was old and I forgot to remove this sentence - see below.)

The most recent content on lemmy.blahaj.zone that I see from sh.just.works is from 2 hours ago: https://lemmy.blahaj.zone/post/1688895/11494679, so those two definitely are federated (I checked and don't see either one in the others' instance blocked list). However, as expected the user https://lemmy.blahaj.zone/u/CDRMITTENS@sh.itjust.works has no content more recent than 7 months ago. They both say that they are running the same Lemmy version - 0.19.5.

Searching... seems not to work for these style of posts, b/c while the searches pull up zero results for common things like a single space, a colon (inside a URL?), the single letter "a", etc., there actually are such posts, e.g. https://sh.itjust.works/post/27811262.

Also, !noncredibledefense@lemmy.blahaj.zone only has 10 posts total, but none are from cdrmittens.

So yeah I think you are correct - the old content that was already there in Blåhaj Lemmy's database remains, for their content posted to !noncredibledefense@sh.itjust.works, but after the ban anything that the Blåhaj Lemmy tries to pull in for that user just gets discarded, and not added to the database. i.e. it has the old but not the new content, for that user. Most likely votes as well as posts or comments (b/c why would that be different?). Though since !NonCredibleDefense@sh.just.works has nothing to do with lemmy.blahaj.zone, they can continue to post on their own home instance - it is only Blåhaj Lemmy that will not see those posts, by design, b/c of the ban.

I hope that makes sense!:-)