Why the service of grpc is undefined when i set configuration for kafka?

i'm trying to implement microservices with grpc and kafka but when i add both options in main.ts the client of grpc doesn't load on "onModuleInit" method this is my main.ts:

async function bootstrap() {
  const app = await NestFactory.create(AppModule);

  app.connectMicroservice<MicroserviceOptions>({
    transport: Transport.GRPC,
    options:{
      url: '0.0.0.0.:50053',
      package: protobufPackage,
      protoPath: join('./order.proto',)
    },
  });

  app.connectMicroservice<MicroserviceOptions>({
    transport: Transport.KAFKA,
    options:{
      client: {
        brokers: ['localhost:29092'],
      },
      consumer: {
        groupId: 'orders-consumer',
      },
    },
  });

  await app.startAllMicroservices();
}

and my client in the provider:

public onModuleInit(): void {
  this.service = this.clientService<ProductService>(PRODUCT_SERVICE_NAME);
}

At this point this.service is undefined only when set kafka configuration, i don't know if I'm missing something or did I misconfigure?

Any suggestion would be very helpful!

call await app.init() after app.startAllMicroservices()