New here and hoping I can get some info on what’s going on with my car. Have a 2011 Kia Optima sx. Cars has been great up too last week. While I’m driving the car will shift down on its own. Where it shows drive on cluster it will show it shift down all the way down to 2nd like I put it in sportmatic mode. If I slide it over into sportmatic and back to drive it goes into drive again but shortly after does the same thing. Doesn’t happen all the time but does majority. If anyone has had this problem or have heard about it please chime in.