I've got both a Lemmy.world and Beehaw account so I can still participate in communities on here, but... I also seen this post come up in my "Local" feed as soon as you posted it.
That's not the weird thing though, as I was on Lemmy.world when that happened, and I'm also not subscribed to [email protected] on my Lemmy.world account, yet it still showed up in "Local" there.
Currently attempting to comment from my Lemmy.world account instead of my Beehaw account, to see if that's still working as well. If this submits, then I'm wondering if something about the federation blocklists in Lemmy isn't quite working as it should.
EDIT: Well, viewing and posting from a defederated instance apparently still works, so yikes indeed.
It's not really drama or a beef between Lemmy.world and Beehaw, but Beehaw has recently (as in yesterday) added both Lemmy.world and sh.itjust.works to their blocklist as those two instances are very large with completely open registrations and Beehaw admins/mods were having trolls/unsavory people go through those two instances and creating new accounts to get around bans and stuff like that, is my understanding.
Right now, Lemmy doesn't have more fine-grained controls for instances like Beehaw which requires approval/vetting to create an account on to block interactions from particular instances without just cutting off ties with that instance completely. Ideally, Lemmy would add an option to allow federation between instances as normal, but require external users (from other instances) to be approved by the instance (such as Beehaw) before being allowed to interact with the communities there.