It's probably because it's always using the secret now and using nip 5 , clients doesn't know the secret it should use. You can try enabling listen for new connections in the settings.

nip05 login was deprecated in favor of the nostrconnect because of this. With nip05 login you don't have a secret, someone can spam you with login requests, you need a server and if you don't have your on domain you will need to trust the nip05 provider to use the relay you want.

The best example for a nostrconnect login for me it's nostrudel, it shows a qrcode and let you change the relay. This way the user is always in control and can use a local relay like citrine or a relay in his home computer