When I ask GA to increase volume indeed increases it. But only by 1%, which is not perceivable at all. So if I wanted to go from 20% to 30% I would need to ask it 10 times! This should be much more rapid, like 0% (muted), 5%, 10%, 15%, 20% or even 0, 5%, 10%, 20% etc.
Similarly If I ask GA to “Set volume to 5”, it sets it to 5%, not 50%.
Is it a recent bug, something that will get fixed soon or Sonos feature?