<t> Found something out. My game that I built is using the 1/2km scale. What I've discovered is that if an air mission is set to interdiction in the scenario and the scale is set to 1/2km it crashes. Not sure if it's how I designed the map or what. It doesn't crash if scale is set to 1/4km, 1km, or ...

The game crashed on me also doing the same thing. Built my own scenario and then set it to computer vs computer.
It usually crashes on the 2nd or 3rd turn but sometimes [rarely] it plays all the way through. Here's the crash
log: