I don't know when this changed, but the opacity of the d-pad control option doesn't go down anymore when it's set, and instead stays at 100% opacity. The joystick option has the opacity work as intended (except with the buttons, which may be included in this bug).

Screenshots attached include two new screenshots showing current behavior, and an older screenshot showing older behavior. All screenshots were taken with HUD opacity in video settings set to 50%. Newer screenshots have no resource packs enabled.