Not sure if it is because it's hosted on PieFed, although that shouldn't matter, but trying to subscribe to [email protected] gives a message saying I've unsubscribed. It also doesn't show any posts although there are some on the host instance (that's probably a federation issue though, nothing to do with Connect).
That doesn't sound like a bug, that sounds like a feature in this particular case.
EDIT: I mean to say it's fitting given the community, nothing against the community itself.
Lol if it was an intentional effect that would be pretty funny.