its a Bootcamp issue, or ?.. what can MSFS developers here do ? Or did you mean windows users (native) see same ?
EDIT:
to be sure I did some tests:
- I can not see any deplay with usage of a throttle ( joystick )
– it reacts instantly ( e.g. the rpm target selector ) - If use the keyboard
– I can notice a very short moment for the first reaction
– and of course it is not so fast as what I can do with my throttle
So, if you mean these little moment while you use a keyboard, it seems not related to bootcamp and seems all keys react in that way. But whether I would tell this a lag… hmmm… its simple that you steer the airplane with a keyboard. May be not many user notice that, think most simmers use any kind of controller.