I would have to ponder this as well. Maybe it is a lane departure/blind spot monitor feature? If it isn’t it’s still slightly scary issue at hand. Curious as to what the fix is.
The JL doesn't have any sort of lane departure system. I have the safety group on mine, but all it does is give you an amber light in the rear view mirror when a car is in your blindspot. It will beep if you put your turn signal on to change lanes into a a car, but it does not affect your ability to enter the other lane.