Login with an account but access was revoked

[xyNNN]

It's a bit strange and I've created a support topic at Apple already. But perhaps somebody from the community can help me.

After creating the app, service id and key and implementing all at the first time, I authenticated against Apple and they wanted to create a new account with my email. The authentication was successful and all went fine. Afterwards I've revoked the app from "Sign in with Apple" from my apple id to test again the sign up process. But then they don't ask my to create an account with that email address, they try to login with my apple id but then I get an error because the email address on the access token request is only popluated at the first request (when I create an account).

Anyone from the community had this behaviour before?

Thanks in advance!