Owners/service Manual problems of the 2014 BMW X5

My vehicle has soft-close doors, when I started driving from home, all the doors were closed, and the doors were locked. After about 2 miles, I suddenly heard loud noise/air coming through the front passenger door. The front passenger door popped open while driving, not fully open, only a little to hear the noise and for the open door indicator to light up on the dashboard. This happened when my kid was sitting in the back. I have to pull over safely within few yards and closed the door manually. This is dangerous as my kids sometime sit leaning onto the door or take a nap with support from the door. I stopped driving the vehicle and took it to the dealership at the next available appointment. The dealership checked and returned the vehicle back saying they are "unable to reproduce".