This is laughable, so now we are being supervised by a crew member who more than likely has no idea what is going on in the flight deck and possible only has two weeks training since not being allowed on the flight deck as a general member of the public.
So now I have someone I don't know at all standing or sitting behind me. Apparently only a rostered crew member can carry out this duty aswell, so even if I have a check captain on the jumpseat who is staff travelling I will still need to get a cabin crew member in there aswell when the FO wants to go to the loo.