2014 Ford Focus Electric engine problems

I was traveling about 35 MPH when my car flashed a message "stop safely now" and the car had lost power to the wheels and I was now just coasting. I pulled the vehicle off to the side of the road. I was able to turn off the vehicle and get it started again. I was lucky that I was able to safely get my vehicle to a safe place had this been on a freeway I would have surely been in a serious accident.

Six times my car's engine has stopped working. Either I am driving and it gives me a 10 second warning before the engine shuts off or I am parked and it won't start up properly. Every time it gets towed or I take it to the dealership, they tell me they have updated the computer system and it should be fine. Ford's corporate office has said results are inconclusive and there is nothing they can do to help me. After doing research online, it seems like this is a common issue with this vehicle.