Sign in with Apple by Unity - get all the user details but credential state is NotFound?

I manage to get the details of Sign in With Apple. I get the userID, the token, email and full name, but when I check the credential state it is always “NotFound”. Additionally UserDetectionStatus in the
LoginCompleted callback (which returns as a success) is Unknown. This is just in the sample scene directly provided by Unity. Would anyone know why this is?

Having the same issue here. Any progress?