New Twitch feature cannot increase volume at all, pause, or make fullscreen

On Chrome at least, buttons are greyed out like this

You can’t click anything, and I can’t find any way to increase the volume by raising the volume before selecting a stream, or by going on twitch itself and trying to raise the volume there and then restart the watch2gether stream.

Thanks for your report. Unfortunately does the Twitch player API not allow to control the volume for embedded streams. I hope this is going to change soon…