Designer view iframe issue

I am using the designer functionality in our application. The application uses angualrjs framework and ng-include functionality from the angularjs framework. The ng-include will either launch the HTML with iframe for the document designer or It will launch HTML form for data entry. I am getting an error in IE 11 that the form becomes readonly when I perform some operation in the designer iframe and navigate back to the data entry screen. It works fine when I just launch designer in the Iframe, not perform any operation and navigate back to the data entry form. Have anyone faced this scenario.