No sound when switching audio from phone app

I'm using the ROKU android phone app and when I switching to phone speakers work fine. But when switching back to receiver speakers using HDMI ARC I get no sound. I can't switch back to phone speakers even though the phone app shows a green dot indicating that phone speakers are selected, can't control volume of TV and sometimes I can control the receiver volume but the volume display from the TV never changes and still no sound.

Only way to get sound back at all is to turn off TV and turn right back on.