I recall the devs describing increasing the number of points that apply to the top of the wing in order to simulate the effects of wind turbulence and icing. I’m not sure but that might explain why aircraft inversion negated the effect, as the forces weren’t being applied on the bottom surface of the wings ?
Perhaps this is easy to fix, as upon inversion you need to gradually change the force points to the bottom.
But as long as this bug exists, I wouldn’t worry about icing conditions in the sim 