I don't know if it is just a mis-telling of the F-22 bug (I suspect it may be), but I have heard of a bug in the autopilot software of some fighter plane that w

I don't know if it is just a mis-telling of the F-22 bug (I suspect it may be), but I have heard of a bug in the autopilot software of some fighter plane that would cause the plane to flip upsidedown when it was south of the equator on autopilot. Presumably this bug was discovered during simulations, and was never actually accidentally triggered in the wild.