Unwanted GHOST objects!!

Hello, i made a car but when i drive it over a empty plane it acts like it hits invisible objects,but i never placed those objects.

Has someone encountered the same problem and solved it,please let me know.

Quads consist of two triangles. Most likely the object hits the edge between the triangles. Switch on “Show physics representations” to see it.

Thanks for the reply,but what a Quads?

they are squares and rectangles and any shapes that have 4 points connected.

Thanks for the reply,but what can i do about it?

use the vehicle wrapper

I fixed the problem,it was caused by using convexhull bounds.