Yeah damus seems to be the only one case sensitive. Made me switch to lowercase only tho and stick to it on Nostr-Check.com

😅 nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 clients are supposed to treat these as case insensitive:

> ... NIP-05 assumes the part will be restricted to the characters a-z0-9-_., case-insensitive.

https://github.com/nostr-protocol/nips/blob/master/05.md

its working now but you don't have to change your display name to match, you could have left it and just changed the NIP-05 identifier