No volume on youtube tv when switching from other apps, has this happend to others? i have two new chromecasts with google TV and they both do this coming from netflix or Amazon Prime or Plex. I have to restart the tv's for this to work. One is lg and the other Vizio. Both tv's are new within a year or two.
What’s the audio settings on them? Is Google TV set to control the volume or let the tv control it or an audio receiver? What about Dolby Digital or DD+ or Atmos? Have you played around to see if this behavior changes?