Membership shortcode causing error

I am having 2 problems with the membership shortcodes.

The first is that despite having the show restricted access text box ON (and text written), nothing is showing up between my membership tags – so all a visitor sees is…nothing.

2nd thing is that when I have the membership codes on any page – listing or blog post – it kicks the user out, (reverts to login/register regardless if they are logged in or not). It does the same if I use the built in restrictions on the listing.

Any help before I resort to a ticket as I have worked through all I can (inc. disabling all plugins)