External camera movement stutter

[some1]

I noticed that panning the external camera (like F2, or Shift+F2) is not smooth. When panning the camera it feels like the game runs at much lower FPS than the counter shows. Does not matter if you use mouse or keyboard. This is more apparent on a fast 100Hz+ monitor or in VR.

 

Turns out, the camera does not move every frame. It can skip one, two or even more frames before it updates its position again. This happens only in external views. The cockpit camera moves with every frame, so the cockpit panning is smooth as it should be. 

 

Below are a few subsequent frames recorded from the game. The game was running at 120 FPS and I was panning the camera around the airplane in F2 view. You can clearly see the debris and tracers moving every frame, but the camera moves every odd frame or worse.