Empty fields in recommendation engine response (on ezplatform-ee-demo):

https://reco.yoochoose.net/api/v2/1542/anon/blog.json?numrecs=3&contextitems=221&contenttype=18&outputtypeid=18&categorypath=%2F1%2F2%2F216%2F223%2F&lang=eng-GB&attribute=title&attribute=intro&attribute=image&attribute=uri

"attributes": [
        {
          "key": "intro",
          "values": [
            
          ]
        },
        {
          "key": "image",
          "values": [
            
          ]
        },