nostr:npub18fad5wskhnfnka0dy52n8hnlskj5g37ktxjnh235znuuadz9a4ss46g425 nostr:npub1x8tf8l4z7jm9v8nslc2my5w2ynlceszrukfnvyksruu9muw48c7qh89je7 
Yes, if Ivory asks for the activitypub+json version, that's what it'll get.
Not much I can do about it - so probably worth you pinging the app to let them know.