This is my story:
I just got my Hellcat Monday, yesterday as I was driving it off of my lift, I had moved just far enough that there wasn't room to open the doors of the car when it pulled the Automatic Park on me. The message on the instrument cluster didn't say anything about a door being ajar. I tried every thing I could think of, nothing, I was stuck, couldn't get out of the car and it wouldn't move. I don't even know why, but in desperation, I tried opening and closing the door. Finally, it went into drive and stayed there.
I just finished reading every word in the several manuals that come with the car, nothing was mentioned.
I don't know what else may activate the Auto Park, but a door ajar will immobilize the car.