Hi Andre,
I mean when i am inside Poweramp, if i lower down the volume knob to says 38% (2nd tab inside Poweramp). Later, after i shut down my Poweramp and car, the next time i start my car, switch on my head unit, open Poweramp, that particular volume knob will resume back to 100% (not my last set at 80%). It is weird, this make me very difficult to tune my Poweramp.