Running a native image on GCP (Cloud Run) throws error 400

Start with the Firebase Admin dependency declarations and the Firebase Cloud Messaging client running as a native image on Cloud Run, comparing the reported JVM and native-image behavior. Reproduce the 400 response with the grpc-netty-shaded exclusion and grpc-okhttp substitution, then determine whether the issue is in request construction or the native-image configuration. Done means documenting a supported configuration or a minimal reproducible diagnosis.

Hi,

Compiling to native this dependency:

<dependency>
      <groupId>com.google.firebase</groupId>
      <artifactId>firebase-admin</artifactId>
      <version>9.2.0</version>
</dependency>

makes the build fail because grpc-netty-shaded, however with this alternative we can compile:

<!-- FCM -->
    <dependency>
      <groupId>com.google.firebase</groupId>
      <artifactId>firebase-admin</artifactId>
      <version>9.2.0</version>
      <exclusions>
        <exclusion>
          <groupId>io.grpc</groupId>
          <artifactId>grpc-netty-shaded</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    <!--Using OkHttp over netty because the shaded netty included in grpc does not work with native image-->
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-okhttp</artifactId>
      <version>1.51.1</version>
    </dependency>

The problem is that FCM client always responds with error 400:

Exception in thread "main" com.google.firebase.messaging.FirebaseMessagingException: Unexpected HTTP response with status: 400
{
  "error": {
    "code": 400,
    "message": "Recipient of the message is not set.",
    "status": "INVALID_ARGUMENT",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.BadRequest",
        "fieldViolations": [
          {
            "field": "message",
            "description": "Recipient of the message is not set."
          }
        ]
      },
      {
        "@type": "type.googleapis.com/google.firebase.fcm.v1.FcmError",
        "errorCode": "INVALID_ARGUMENT"
      }
    ]
  }
}

Running on JVM works fine.
There is a issue with same problem: https://github.com/GoogleCloudPlatform/native-image-support-java/issues/116 for the old google native support libraries. Their workarounds didn't work for me.

Are there any know solutions?
Thanks