Using car template scripts in version 7.85, the car hits an invisible wall and stops on terrain created in MED. It happens in several areas without apparent reason. I have turned on wireframe and see no obstructions.

The world includes a skybox and terrain.
I've tried all available collision modes for terrain.

I've played around with wheel scale and shape along with a multitude of other settings. Car is currently at default settings and still doing it.

Terrain is scaled in WED.

Any help appreciated.

This is the second of a double post (first in the Starting... forum), but it has gone unresolved there.