While in traffic and stopped at a light, the engine stalled and completely shut down all of a sudden. I had to restart the car and was able to drive home. The engine stalled while in traffic with two other passengers in the car and during a time with other vehicles on the road. The car stalled shortly after turning a corner and other cars potentially rear ending my car due to a sudden stalling. Im on the way to the dealership where I purchased the 2020 Acura RDX AWD brand new for a check up. The vehicle has not yet been checked by anyone but will be later today. When the car stalled, there were no warning lamps or messages. This was the first time happening but the electrical system has turned off unexpectedly before. Ive brought the car back to the dealership for the electrical system and it was previously repaired. The new problem includes the electrical system outage plus engine stalling during traffic. Very scary and unacceptable for any car.