After inserting the key switch into a hotswap socket, some of the key switches do not trigger a key press.
Here're some possible causes:
the leg (prong) of the key switch is bent
a cold joint at the hotswap socket, or a lifted pad
a cold joint at the diode
Can I use nice!nano in the keyboard?
For keyboards that come with a pro micro footprint, nice!nano can be used. Ferris Sweep supports a power switch and a battery solder pad, but other keyboards do not. You should also visit the following links if you go wireless.