Registering event handler for phoenix events doesn't work

[dyzdyz010]

I'm registering leave channel event handler with code below:

channel.on(Event::Phoenix(PhoenixEvent::Leave), |_chn, msg| {
    println!("<Leave>: {:?}", msg);
}).await.unwrap();

But this piece of code never gets called no matter when I call channel.leave().await or client.disconnect().await.