Camera flash gun

I have a couple of flashguns for my cameras the main one being a Godox V860iii . This had me scratching my head a hell of a lot
I just could not understand why I couldn’t get it to auto distance settings. Maybe it needed upgrade? NO this is the latest version. So a little more digging and research. In actual fact a almost to the bottom of the pit ,so to say.
Like most flashguns they have diffuser built in which can be pulled out. Now I never ever gave that a thought, but that was the cause . It was not pushed back in to the retaining slot which I found out can cause this problem

showing diffuser and bounce flash card partly out from retaining slot