Engine Shut Off Without Warning problems of the 2016 BMW 328

This vehicle suddenly shut off in the middle of the intersection. The entire car shut off and would not start again. You could not put the car in neutral either to get it off the road. The car would not move. This vehicle was on a 6 lane road starting to go from the intersection. I know this has happened to another person with an x3 as well. BMW is claiming this doesn't happen. I was driving a ralph schomp BMW loaner at the time because my 2017 x3 was in the shop. I have the other person's information should you need it. This is a huge safety issue. The other person this happened to was on a highway when it happened. It is unknown to me what caused this, but the vehicle flashed lights and told me to turn off the car. When I did, it would not start again. I am concerned that BMW is hiding this problem since I know the same dealership has had this issue before with the same vehicle. People need to be aware of this issue. Thank you.