Since the Badlands expansion was released.
Vehicle suspension has become terrible almost like they have no "virtual shock absorbers" anymore.
I'll list all the issues I know here as they could be related.
1) At server start up all vehicles wheels clip into the terrain.
1b) After sitting in a vehicle and getting out again the wheels go from clipping into the terrain to floating a cm above the surface.
2) Vehicle bounce and twitch from the moment you sit in them.
2b) Twitching is contagious to nearby vehicle.
3) Trucks and cars take huge deflections from kerbs or other small obstructions like small branches in forests. Hitting a kerb with front wheel deflects cars away from kerb , hitting with a back wheel spins the car into the kerb. Hitting a small branch on a forest track sends an 8 tonne truck spinning round multiple times.
4) Going over railway lines at moderate speed can cause bunny hopping on the back wheels of trucks. ( truck bounces up a down several times )