Parked demo cars now hold the handbrake and ignore your input devices from the moment they spawn. Previously there was a one-tick window where a parked car could read a live gamepad, and a resting trigger with a little drift reads as brake, which at a standstill engages reverse. That is why the Go-Kart could crawl backwards out of spawn on its own.

Parked cars can no longer be nudged off their spawn marks by device noise or spawn settle, they stay put until the camera switches to them.