Hi, i turn music off coz i dont like game music(no offence). But after 2-3-4 minutes it turns on, and when i go to settings to turn it off again, it says that music is OFF. Bug?
Same problem here. Annoys the hell out of me since I listen to music while playing. A few minutes later, the game music starts playing again.
Same issue, seems to happen when you open up the action menu again or start doing anything in a menu.
The workaround stated in the pinned post is to turn volume down, then back up again, as I recall. Known issue?
Issue noticed as well in Mac version.
Rather embarrassing when on a work conference call
I have issues with the game music turning itself on as well. Unlike the OP, when this happens and I re-enter the settings menu, game music is set to ON again, unless I leave the game on the settings screen until music resumes, then it stil claims it to be off.
You should not play during work conference calls 
But annoying it is!
More information can be found here:
http://forum.greenheartgames.com/t/music-keeps-turning-back-on-by-tiself/251