My Korg MR1 works the same way. Leave the light on -vs- save the battery. I tend to let the screen go dark, then if I want it to see it I turn the headphone volume up or down a notch (I'm not using it so who cares). Screen wakes up, I take a look, then let it go to sleep again. Even if you are running undercover, everyone's cell phone lights up when they look at it, then goes to sleep. Nothing unusual.