Lately I've noticed that when I open my door a few of my aircon buttons light up (It's always the buttons which are active). Only happens when the ignition is off, and the lights go back off after a second or two. I've also noticed that sometimes the lights flash on/off after I close the door as well. All seems a bit random, and I can't remember if this has always happened and I've just never noticed. Does the same happen to anyone else's?