I just got a (*)Xiaomi Mijia Smart Switch to try out from Gearbest today.
When I started Zigbee Discovery it found it right away, but it never finishes the "initializing" process. I have even let it set for 20 minutes initializing, but it never finishes. Also tried rebooting the HE hub and started over, but keep getting the same results.
I didn't see anything posted about the initializing process never finishing. I have also tried and replace the battery and had the button with in 2 feet from the hub during the setup, but no luck.