While flying with a friend on the hoggit training server and rotorheads server today, we noticed excessive levels of desync that essentially made multicrew unusable. An example of this is when the pilot starts up the aircraft and the rotors are turning and power is on, but on the operators seat the aircraft looks cold and dark. Issue didn't resolve itself until operator slotted out and back in. Another example of this is when trying to use ATGMs, the operator is holding the sight stable, but on the pilots sight, it looks like the sight is moving all over the place which makes it impossible to fire. Track files provided below from both seats on hoggit training. https://drive.google.com/drive/folders/1XadBje2dLUMKGW38zKSDDyw0O2fYDv5i?usp=sharing