Not sure if this is a Genos bug or design issue but the other night I got called away from my Genos whilst working on a style. I never went back into the room and assumed that it would power-off in accordance with auto power-off setting I had selected.
My Genos was still on in the morning as hadn't auto-powered off so not sure if for this to work you should be in standard playing mode without any edit screens selected or visible.