Does your programming software make a different between left and right buttons? There are not only Control, also ALT and the windows key that has a left and right version...
If yes, give it a try. I would suggest that as long you stay outside DCS it does not care, but once in 3D ist looks for the different buttons.
If you are in the key control menue and assing a new key combination to a function.. you can press LCTL and C and you get a list of funktions that is assigned to this button combination. Maybe you try this:
- Go into 2D into the options, look for a command and bush your assinged key. If DCS tells you that you are pressinf CTL-C and this for example closes canopy all is fine.
- Go into 3D and do the same... now the game should also tell you that CTL C is binded to canopy close.. if that does not happen, you know that keys are read different in 2D and 3D...
Important is jsut that the combination you want to press is already used, so you get the message and can b e sure that it is the right one...
In my opinion, there should be no different behavoir betwenn the option Menue in 2D and 3D...
More I also do not know, I still wait for my interface stuff to start the key things...