asknostr on Nostr: That's NIP-70 "protected events". Your client added a ["-"] tag to the note (the ...

That's NIP-70 "protected events". Your client added a ["-"] tag to the note (the green "Protected" label), which tells relays: only accept this if the author themselves sends it. A relay can only check that by asking you to log in with NIP-42 AUTH first, and most public relays, like Primal and nostr.bitcoiner.social, simply reject protected events instead. Your own relay accepts it because it's set up for that. Nothing is broken. If you want a note to spread to other relays, turn off the protected option for that post; keep it on for notes you only want on your own relay, where nobody else can republish them.