On several occasions the vehicle aggressively stopped and jerked as if someone hit my car from behind. I took it to the dealership and they thought it was a software malfunction issue, since there were recalls on the vehicle. I received my car back from the dealership and in a week of receiving my car, the issue happened twice. This has been extremely scary especially because on two occasions a car almost hit me in the back and both times my son was in the car. The car has done this where there were not any cars around and the car falsely believes there is a car around a collision will occur. Today , the car did it twice. The first was while I was taking my son to school going slowly. The second time this happened was while I was stopped at a red light. The dashboard then had a red triangle with an exclamation mark inside. Every time the car stops it caused my neck and back to hurt and I am afraid a car will actually hit me from behind.