Description of problem: The Transmission will disengage while driving, allowing the car to ‘coast’ as if in neutral. The problem sometimes occurs at red lights, where the vehicle remains stationary for a brief period and then corrects itself as if nothing happened. I noticed the ‘D’ character flashing on the dashboard when the issue occurred, indicating a problem. The engine will rev, but the car will not move. The vehicle spent about two weeks at the dealership (Hyundai of New Port Richie, FL), but they were unable to find an issue after conducting over 80 miles of test driving. The last incident occurred on June 8, 2025, only days after I had removed the vehicle from the repair shop due to this problem. When pulling into my son’s driveway, the car’s engine revved to about three thousand RPM, and the vehicle rolled backward, out of his driveway, and into crossing traffic. Luckily, the pickup truck on the street was able to stop before hitting my vehicle, which was now sitting in his lane of traffic. I looked down at the dashboard, and the car was still in ‘D’ but would not move forward. After a few seconds, the transmission re-engaged and moved forward again as if nothing had happened. I DID NOTHING AND THE CAR RECOVERED BY ITSELF! I returned the vehicle to the dealership for further investigation on June 9, 2025, and am driving a rental. Summary: This car is unpredictable and unsafe in this condition. Someone could drive this car for days without experiencing an issue, but it does happen when you least expect it! I use this vehicle for local travel only, about twenty-mile trips.