Issue in saving data in source mode

Hi,

I am  using Ckeditor latest version. I implemented it in my project in that i am using AngularJS and Rails. 

When I copy - paste content in ckeditor source mode and I submit form, data does't get save.

I am using following ckeditor directive.

App.directive("ckEditor", function() {
  return {
    require: "?ngModel",
    link: function(scope, elm, attr, ngModel) {
      var ck;
      ck = CKEDITOR.replace(elm[0]);
      if (!ngModel) {
        return;
      }
      ck.on("pasteState", function() {
        scope.$apply(function() {
          ngModel.$setViewValue(ck.getData());
        });
      });

      function updateModel() {
         scope.$apply(function() {
          ngModel.$setViewValue(ck.getData());
        });
      }

      ck.on('change', updateModel);
      ck.on('key', updateModel);
      

      ngModel.$render = function(value) {
        ck.setData(ngModel.$viewValue);
      };
      ck.on('instanceReady', function() {
        ck.setData(ngModel.$viewValue);
      });
    }
  };
});