I have a brand new 2021 explorer ST. It is 3 weeks old and has already been to the dealer service department 2x. For reasons no one can figure put when anyone of the doors is closed,intermittently the rear lift gate will open by itself. Dealer thought it was the battery as it tested at only 63%. Just happened again tonight after battery swap. Dealer has no idea what else to try and bis waiting for help from Ford. Meanwhile I am not comfortable traveling with it as I never know when this will happen. All of the instances when this happens seems directly tied to closing a door. Not sure its related but also a problem with keyless entry keypad. When the car sits for several days the keypad will not light up or work no mater how many buttons are pushed. Have to get in with fob and start car, then keypad will work. HELP