Image not displayed in edit mode: the XDOM editor renders the edited content in the context of the editor

Follow this steps to reproduce:

• Create a new page with this content:

  {{velocity}}
  {{html}}
  #if ($xcontext.action == 'edit')
    $!services.edit.xdom.defaultEditor.render($tdoc.getXDOM(), {
      'id': 'content',
      'name': 'content',
      'rows': 25,
      'cols': 80,
      'full': true
    })
  #end
  {{/html}}
  {{/velocity}}
  

• Access /xwiki/bin/edit/Sandbox?sheet=ThePageYouCreatedAbove
• Scroll the editing area to the end and look for the XWiki logo. The image is not loaded.