cygwin vim doesn't know app bindings to file exensions?

I am using gvim for Windows as well as [g]vim for Cygwin64 (64-bit cygwin). The netrw version for both is 149.

1) When I use gvim for Windows, I can position the cursor on a file
and press "x" to launch it by whatever Windows app is associated
with the file type.

2) When I use gvim for Cygwin's X-windows, nothing happens when I
press "x" other than the message to Press <CR> to continue.

3) When I use Cygwin's vim and press "x", vim gets put into the
background and I have to use shell commands to bring it back to the
foreground. The file is not launched.

It seems like the Cygwin64 impementation isn't set up to recognize Windows bindings of apps to file types. Is this correct?

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