I hope I am not sounding like an idiot when I ask this question but this has happened to me 3 times this past week. When opening a Door on my 2010 Islander the radio unit will give a quick flash as if it is turning on. The vehicle is off and there are no keys in the ignition. Like I have mentioned, I have only noticed this within this last week and it doesn't seem to do it every time. My Jeep is stock so far and the radio is the 6 disc changer radio. Is this something that needs my attention, like a wiring issue I need checked out or is this normal behavior? Thank you for any help in advance.

Does anyone else experience this behavior when they open their doors? Hoping someone will put my mind to ease that my JK wont burn up.