Client connects but don't see any handling data

[delp]

Can you help me understand why I'm not getting any output after the send?

I have these two programs running in different terminals on the same host.

Listener

func main() {

	if len(os.Args) != 2 {
		panic("ahhh")
	}

	address := os.Args[1]
	port, err := strconv.Atoi(address)
	check(err)
	port16 := uint16(port)

	listener, err := noise.NewNode(noise.WithNodeBindPort(port16))
	check(err)

	defer listener.Close()

	listener.Handle(func(ctx noise.HandlerContext) error {
		if !ctx.IsRequest() {
			return nil
		}

		fmt.Printf("Got a message: '%s'\n", string(ctx.Data()))

		return ctx.Send([]byte("Hi"))
	})

	check(listener.Listen())

	fmt.Println("listening on", listener.Addr())

}

Sender

func main() {

	if len(os.Args) != 2 {
		panic("ahhh")
	}

	address := os.Args[1]
	sender, err := noise.NewNode()
	check(err)

	defer sender.Close()

	check(sender.Listen())

	check(sender.Send(context.TODO(), address, []byte("Hi Bob!")))
}