It's possible that there are breaks in federation. It could be because of one main reason : Beehaw didn't send it to mastodon. Now why would that happen?
- It could be that Mastodon blocked it for whatever reason
- It could be that the server crashed and so all federation outwards was lost
- Wait, that happens? Yeah - Lemmy does not keep the federation queue if it crashes. (see: https://github.com/LemmyNet/activitypub-federation-rust/issues/31 )