I just noticed the MAC address published on the back of my Smart Bridge MZ1 is B40ECFD3B6A2. But that isn’t the address it has on my network at all. My guess is when they made the first device and printed up the outside of the devices that was correct. But they didn’t keep changing it as they made more devices. :)
My device real MAC address starts with C4D7FDDE.
Does your Bridge MZ1 have the same MAC address on the outside of it as mine?