@jdp23@neuromatch.social I don't want to get overly technical about it, but that's due to fixable deficiencies in Discourse's AP integration.
I think you should be able to follow the @community@socialhub.activity.rocks actor, no?
The "copy URL" flow is especially prevalent on the fediverse, but Discourse doesn't support it (neither does Ghost, while I am talking about it.)