Quite randomly found this bug and its reproducible always, what you need to do is set AI skill of aircraft to 0.0 in .json file of the mission and some control surfaces of AI aircraft will break (some of them disappear some of them would be set straight horizontally) making them unable to maneuver and fall to the ground
This bug affecting: Ifrit, Medusa, Cricket (for it its worse, because all blades are vanishes and engine sound gets buggy), Revoker, Darkreach, Compass

