So there's a descriptive name, an @ name, and a URL name, all of which show differently. When I click on your link to go to that community, it shows "!onion@piefed.world" in the community subheading, but the individual posts below drop the exclamation mark from the @ name. I can see the reasoning behind the three different variations of the name for different purposes, but the difference between the two @ names seems like a bug to me.