Here's an edge case for you. Using Chernarus terrain from CUP. Added Air Command module to Balota airport. It spawns faction aircraft which take off correctly.

Problem is Balota has a grass strip runway and wanted to make it look better so I placed runway assets which are snapped to terrain surface and disabled simulation on them so they're static. Now when Air Module spawns an aircraft, they board correctly and it starts to taxi as before but the AI barfs when it gets to an end of a runway asset section and freezes right at the edge of the asset.

Ideas?