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