The problem is with the throttle pedal assembly. They're bad about sticking sometimes, so you need to remove it, pull it apart (I used small screwdrivers at each of the clip-together points to release it a bit at a time), and put some white lithium grease at the pivot points and locations where things slide together. I had to do this to my 2018's a couple years ago and haven't had a single instance of it climbing since.