muzzleImpulseFactor on CfgMagazines, which are used by high-ROF CfgWeapons on helicopters, cause the helicopter to desynchronize for every other client and server after using that weapon. Recoil of the weapons in AFM is not handled properly.

This can most easily be observed by applying any muzzleImpulseFactor greater than {0, 0} to miniguns of the vanilla Little Bird in Multi-Player. Let the Pilot fly and shoot the miniguns (with AFM enabled!), after a few shots he will start flipping for every other non-local client. It is best observed when landing as the helicopter will try to interpolate between pilot's position/rotation and server's (or other client's). Upon getting out, the helicopter will flip and might explode.

This can also be observed on vanilla Kajman O_Heli_Attack_02_dynamicLoadout_F with it's auto-cannon, but in a very reduced rate (few hundred shots) as the auto-cannon has low-ROF. For this to work Pilot must be alone in the helicopter and use "Manual Fire".