OIDC Apple, 422 Unprocessable entity. Google works fine

[Maragues]

I've set up Google & Apple Social sign-in. I'm logging in from an Android native application. They both worked in the past, but Apple stopped working some time ago.

After the user clicks on "Sign In with apple", I open the consent_url on a browser. Then, the user logs in to its apple id and proceeds, but instead of being redirected to the url I expect, it's redirected to localhost. I see these logs in kratos, right after user logs in and proceeds

status:422 text_status:Unprocessable Entity

Then, I'm redirected to some error flow, which are probably irrelevant to this question

host:localhost method:POST path:/self-service/methods/oidc/callback/apple query:<nil>

I don't know if the Unprocessable Entity error comes from some misconfiguration of the apple credentials or the jsonnet. I've checked and I don't see any error.

Comparing the logs with a successful Google sign-in, on apple there's no mention of jsonnet. These kratos logs from google aren't present on apple

msg=Received successful OpenID Connect callback but user is not registered. Re-initializing registration flow now. audience=application provider=google service_name=Ory Kratos service_version=v1.0.0 subject=...
msg=Merged form values and OpenID Connect Jsonnet output. audience=application http_request=...] mapper_jsonnet_output={
   "identity": {
      "traits": {
         "email": "[email protected]"
      }
   }
}

Any hint will be welcome