NHTSA Complaint #11465451 — 2021 RAM 1500

On two separate occasions while backing out of my driveway, my truck automatically jumped from 2WD, to 4WD Low/High both simultaneously and also locked the park brake. In both of these cases, I was able to place the vehicle in park, turn the vehicle off, let it set a minute or two and once restarted, the vehicle was in 2WD again and performed as it should. It was just concerning as to why it would do this. But on May 5th, I left home and was traveling down the road at approximately 20 mph, when the vehicle jumped into 4WD Low/High once again and the park brake engaged automatically. I always wear a seatbelt, but had I not had it fastened yet, I would have immediately been slammed into the steering wheel. It was towed to the dealership as it would never release from 4WD or the park break would not release either. They have had it since May 6th and cannot find anything wrong as it has since went back to "normal" as they said. But this is a major safety concern if it will automatically jump into 4WD at 20 mph......what will keep it from doing this at 70 mph on the interstate? That will cause all sorts of issues and probably fatalities if this happens. I do not feel safe being told that nothing is wrong with the vehicle and that I can pick it back up, and drive it until it happens again and they will see what they can find then. It might be too late at that point.