Vehicles clipping through terrain

[Raxsar]

Version 1.0.13. Any time terrain is "flattened" or modified, my vehicles and any unattached platforms will begin to sink into the ground. Vehicles are then very difficult to dig out as any terrain modification done around them makes them sink further into the ground. I have to dig way below them and make a sort of landing platform and than dig around the vehicle itself for it to sink onto.