I had this same issue and believe it has something to do with the rights that the user has been assigned. I have not figured out what that is yet, but on duplicated sites, the toggles work when I am signed in as other user types.
However – an easy fix is to disable Visual Composer temporarily. Then, go in and build your shortcode through the WPShow posts admin. When you are done, re enable VC, enter the shortcode where you like it and then it will work.