Twitch chromecast is buggy

The general chromecast functionality of twitch has a lot of bugs that annoys me a lot.

For instance if you cast from a browser, there's a "is playing on chromecast" message on the stream in the browser, but the sound is still playing in the browser. It should mute, so I don't have the same sound playing twice with some delay between.

Also. If you stream to your chromecast and any! device on your wireless network, like for instance iPhone, opens the twitch app, the chromecast gets sent to the backdrop.

This is really annoying since I cannot switch between any device without having to find my stream and cast it again.

Often if I cast from my iPad and let it stream for some hours, let's say over the night, and then open the app again, my tv turns on and shows me the twitch backdrop. Just sitting there chilling. (HDMI-cec gets a turn on signal from the chromecast twitch function)