Not sure what you mean by “wordpress test environment”. Are you referring to wordpress default theme or on a different set up with exactly the same plugins and theme as on your live site. Since this works on our demo site http://demowp.webtechideas.com/, we are unsure what’s wrong at your end.
We need to have a look at a live site to know the issue and suggest you with ant fix. Can you please set up a demo site with exactly the same set up? Also please provide admin access of the demo site so that we can investigate the issue.