Cant you disable FOV field when in optics mode? Isnt it possible to disable automatically FOV everytime you enter optics mode?
You're in 3rd person, you see a guy, you enter optics mode, go to menu, and no FOV. and if you try FOV before you scope/optics, as soon as you enter that view, FOV gone.
Sorry, this is just a wild guess, dont even know it can be done, just trying to help