ng-Ckeditor, angularjs: Sometimes, ckeditor could not load data to display in html

Question

I'm using ng-ckeditor http://ngmodules.org/modules/ng-ckeditor for angularjs app.

My-code .html

<textarea ng-model="target.Content" ckeditor></textarea>

.js

getData().then(response){
$scope.target.Content = response;
})

I have a problem is: Sometimes, CkEditor in Html display nothing. I don't understand why Please, help me!.