I don't know if this is for every game, or if it only is happening to me but whenever I use the auxiliary option on Rainbow Six Siege something happens with my sensitivity
To explain what happens I'll explain how to recreate it, go to auxiliary, set the activation to left mouse click (the shoot button) now if I ADS and click the left mouse button (shoot) my sensitivity goes extremely high, and is only fixed by unadsing even if I press shoot again. Since I have the same sync and sens, and it's not on toggle my sensitivity shouldn't be doing this whenever I ADS and press the shoot button.