Cannot map the 'Window' key of a window keyboard of IKBC KB87 I am not sure if it is a generic behaviour or merely a problem with this particular keyboard. 

I have used the eventviewer of karabinar to check.

 Pressing the left or right window do not register any event at all.

OSX recognise the keyboard as ANSI



Here is a photo of the keyboard: 



and here is the link to the product.

 

What is the likely cause of the issue? The hardware key event is not firing or osx is not registering the window key?
The keyboard has a windows key lock feature that is turned on.

In this particular keyboard the toggle switch for windows key lock is Fn + Windows key. 



The trigger for windows key lock may be different in other keyboards.