Clipboard copynames=unc with @keydown parameters

I create item in file and folder context menu with this command :

@keydown:none clipboard copy nofromfocus @keydown:shift Clipboard COPYNAMES=unc
if i shift clic on file in network location, it's ok, but if file is on hard drive, name with extension is sent to clipboard.
Normal ?

Not that if i create item with only "Clipboard COPYNAMES=unc", it's ok on network and drive.

Same thing happens here. I guess it's a bug as when shift is held down the command should be the same as Clipboard COPYNAMES=unc on its own, unless I'm missing something.