Protected tag not rendered right with insertElement

[Stefan]

I configured a tag for protection:

Excerpt from config.js

CKEDITOR.editorConfig = function( config )
{
  config.protectedSource.push(/<protected>.*?<\/protected>/g);
  // ...
};

The following

editor.insertHtml('<mct>some text <protected>foobar</protected></mct>');

produces 'some text' in editor.

The following code produces some missbehaviour:

var mct = CKEDITOR.dom.element('mct', editor.document);
mct.setHtml('some text <protected>foobar</protected>');
editor.insertElement(mct);

I see 'some text foobar'.
Switch on source view.
Switch off source view.
I see 'some text'.

[Frederico Caldeira Knabben]

The element::setHtml behavior cannot be controlled by us, but the insertHtml function should definitely handle this situation properly.

[Garry Yao]

The 'insertHtml' function works correctly for me in this sense, Fred could you confirm it again?
Ticket Test added at : ​http://ckeditor.t/tt/4243/1.html.