This reminds me... @silverpill's Mitra account is already compatible with nomadic ActivityPub. His posts have a DID already. This means that existing Mitra accounts are switched over to nomadic ActivityPub.

But (streams) channels like yours that were created on accounts registered before 24.07.20 are still in the old, pre-nomadic mode.

Could there be interference here between (streams) without nomadic AP and Mitra with nomadic AP? Could it be that (streams) has problems with "nomadic" AP actors trying to interact with "pre-nomadic" (streams) channels?

"Nomadic" (streams) to "pre-nomadic" (streams) shouldn't be that much of a problem unless I've just managed to freeze your instance with my dislike and my comment.