Grass? What about the invisible bump-mines all over the landscape?
You go 60kph on a flat plane in one second and the next thing you know is that you're spinning out of control about 30 meters in the air with a sense of impeding doom as you hurdle towards the next solid object at lethal velocities.
Sounds like the typical problem you get when relying solely on the physics engine for your vehicles, instead of adding at least a few lines of mitigatory code. Sloppy, but apparently not a show stopper for PUBG.
PUBG contains a lot of sloppy things but overall I think it adds more to the charm of the game.
Plus, dying because of a bug may be frustrating but you don't loose anything really. There is no punishment for dying or not being the first other than not getting more points for cosmetics.
Usually when it happens, me/my squad just laugh/cry and move on.
You go 60kph on a flat plane in one second and the next thing you know is that you're spinning out of control about 30 meters in the air with a sense of impeding doom as you hurdle towards the next solid object at lethal velocities.