In the two months that we've had our Ascent Limited the power liftgate has suddenly closed on me twice while accessing the cargo area. It does the usual three warning beeps and then lowers. The second time happened last Saturday and when the door hit my back it stopped and reversed upward again where it stayed until I closed it. It's happened both times within five seconds of the liftgate having reached the fully open position. I always open the liftgate using the button above the license plate. My keyless fob is in my shirt pocket and definitely not being pressed and held accidentally. Both occurrences happened in different parking locations. I've got an appointment with my dealer at the end of the week to have this safety hazard fixed. I'm wondering if it's a bad module sending a signal to close the hatch. Any other owners experiencing this crazy problem?