Message Severity: 2
D:\src\FRONTLINE_PC\FrontLine\Source\EntityHover.cpp(594)
Hover fell thru' terrain, x = -181.282791, z = 158.680176
If you have a hole in your map or a spot that vehicles can clip through, this is what can happen. You can look at the x and z coordinate through SPTest but not sure of any other way.
thanks Dark_phantom i was pretty sure it was related to my terrain.