nostr:npub1jpp36eeycvlkkdy4d4l4lgswvf8jtdare5vly0w0sk7rc39pzgrqlyu59l Just a guess but maybe as ben is pretty short, it may Interpret it as abbreviation? Did you try it maybe with something longer, like Benedict e.G. ?

nostr:npub1jpp36eeycvlkkdy4d4l4lgswvf8jtdare5vly0w0sk7rc39pzgrqlyu59l promoted properties don't have that issue (If you can use them)