Pay With a Like Not working on second pageview

Pay With a Like seems to work okay, hiding and revealing content.
I'm using the selection tool protection method.
But, when I leave and then return to a liked page, the content isn't shown and there is no option to like again - just a truncated post with no hint that there is more to see.
Also, I'm using ajax okay, but when I try the refresh method the page goes into an infinite refresh loop on second view.