I have a object that moving by adding force to rigidbody. With just big flat plane, it works fine but with connected small planes, sometimes(actually not sometimes, a lot) the object bouncing off or rotating to another direction where the planes are met. Planes are placed well, there's no gaps between the planes.
Now next image shows that object was rotated in left direction(I was just keep pressing forward and it just keep push forward).
I tried with more mass values, like 30000-50000, still happens. I don't know why this is happening, where should I check to solve this problem?
Any advice will very appreciate it.
P.S. I forgot to mention it, object using Box Collider.