Since the last expansion, my music's volume is different than usual. It changes during game by itself continuously and it goes up and down. Does this happen to you, too?
Yep, there's an option to disable it. but the real question is, what is this feature supposed to do, apart from scare the crap out of you at 2am in the morning when the volume suddenly switches to full loudness?
It's not that the volume goes up it's that the volume goes down when you open a menu, and returns to normal when you close it. I guess it's supposed to help players concentrate but it's actually very distracting.