Colorbox after ajax load
Here is the updated jquery code that renders the colorbox properly the first time:

success: function (response) {
        $('#coaching_summary_ajax').html(response);
        $('.colorbox-node',context).once('init-colorbox-node-processed',function () {
          $(this).colorboxNode({'launch': false});
        });
        $('.colorbox-node',context).colorbox();

      }