Yeh its kinda funny. It didnt happen in the first weeks, but it happens now every time ! And more interesting is, that it happens to everyone, not just particular players.
You get in, and w/o pressing anything it just drives off. If you press reverse, it just sets off backwards without stopping. Turning is almost impossible too since its only doable at full speed.
Maybe you guys look into it, since i think its something serverside ..