Don't upgrade! There is a massive bug and to be honest, I have to wonder if Apple does stuff like this on purpose.
These holes and back doors are built in intentionally according to a former NSA technical director and other credible whistleblowers.
http://www.iclarified.com/63570/how...e-the-root-user-password-in-macos-high-sierra
Oddly enough, whilst you fixed your MM2 with some paper, mine started doing the disconnect every minute issue, even with paper. So have had to add foil into the mix to stop it from disconnecting. It worked. But, strange given the situation...