Just to confirm, I'm having same issue with the HUD Video Contrast -10% and +10% bindings. Activating physical button bound to "HUD Video Contrast -10%" causes HUD Brightness knob to turn to off position. Activating physical button bound to "HUD Video Contrast +10%" causes HUD Brightness knob to turn to initial on position (presumably 10% position) Effectively this turns the HUD off when u reduce the HUD Contrast. Tried binding controls to different physical buttons but had same results. Works ok when changed in game with mouse.
Thanks