WAGU's have a very strong mechanical connection. I use them when installing the newer type of LED recessed light retrofit things as I'm confident in...
It only makes the loose neutral hot when something is plugged into an outlet on that circuit. The connection is made inside whatever is plugged in. ...
Then open every box on that circuit and test where you have 120 between the black and white. Probably something as simple as a loose wire nut in the...