At high heights, car gravity is glitchy and the car is very bouncy
Example map: v3SAn92bmlHIwhWemLtxmD4p9YlBGZAEohNZJISGYDGfbwSGevfveMYCMe3olM8fA5zADAAEfxE0H
how high is that?
This is due to floating point inaccuracies. There is no plan to fix this currently
It also works if you go far enough out in any direction