Only recently did something happened when I disconnected a boost regulator from the terminals powered by this supply. It gave sparks and then the supply was dead.
When I opened it up, I was surprised that the Live terminal of the supply is actually not connected to anything. It seemed to operate only with the Neutral and Earth wire. I don't know what to make of this.
I would suggest you are mistaken - have you tested which pin goes where using a meter? - visual signs are often confusing on IEC sockets, particularly when they have fuses, lights or switches built-in.