I didn't even notice for a couple of days because all the basic wifi and ethernet stuff worked fine. It was only when I spotted my OwnCloud server was unreachable even though it appeared to be up and running. Then I saw it had a weird IP address. Then I couldn't log in to the router (because the user and password had gone back to admin and admin). I have hotspots in the sitting room and upstairs which are connected to the router by ethernet and they kept all of our wifi going, because their SSIDs and passwords stayed the same.
It was, indeed, Mr H! Hey, that's 1p per unit saved on solder and components. Pure profit.
But yes. Some knob got all excited because with a little firmware tweak that 1p was available. It was probably the same engineer who had ejector seat and starter button on James Bond's Aston Martin linked. Just tell him if it doesn't start first time, scoot over to the passenger side.