Quarkus 1.7 with gRPC and smallrye health issue

This project was generated from code.quarkus.io, selecting quarkus-grpc and smallrye health extensions.

After following the gRPC Getting Started guide, the service was started using mvn compile quarkus:dev

Calls to the gRPC service succeed:

grpcurl -plaintext -proto=src/main/proto/helloworld.proto localhost:9000 helloworld.Greeter.SayHello

But the gRPC healthcheck fails:

curl http://localhost:8080/health

{
    "status": "DOWN",
    "checks": [
        {
            "name": "gRPC Server",
            "status": "DOWN"
        }
    ]
}