Apple Music ridiculously loud on Sonos system

Earlier this year, and suddenly, Apple Music on Sonos has increased its volume such that it is unusable as background music. I used to listen to Apple Music on 3% in the study and now even at 1% it’s too loud to have on. There has been no change to any other services I use (Sonos Radio / TuneIn / NAS music library), just Apple Music via the Sonos App.

From other forums it looks like this isn’t unique to me, but struggling to find a solution/roadmap to fixing - any thoughts/common experiences welcomed.