Can't create Xpath asserts from Json content

In soapUI 4.6 (and before) we could easily create xpath asserts even for Json result sets. Now, for the same result sets, when I add an xpath assertion and click on the little 'select node' button to select an element, it always gives "Unexpected element: CDATA".

I can still make it work, just need to 'manually' put in the Xpath assert. It seems to be specifically unable to show the tree anymore. I'm assuming something basic is failing when converting the json to xpath that worked in older soapUI versions.