unable to preview windows from multiple workspaces

[daljeet-hcl]

I have tested skippy-xd on multiple window managers like i3 and xmonad.

It is unable to show preview of windows which are not in current workspace. I am attaching my screenshot and configuration. Please see if you can help.
In the attached screenshot, chrome preview is not visible because it is not in current workspace.

[Gjum]

from another comment:

You won't see thumbnails of windows from other desktops because that's normal. Most window managers unmap windows on other virtual desktop, and content of unmapped windows is not accessible (or, actually, undefined), as far as I know.