Someone on Mastodon was saying that if you boost someone’s post and are federated with a server that the OP has defederated, that people on the defederated instance can now see the post since someone in their federation boosted it.

This doesn’t sound right, at least because of the way Lemmy works. I though that the post would be hidden from anyone on the defederated instance because it originated from an instance that blocked it. Anybody know how this would work?