How to reproduce :

• In a content, insert a news with illustration using the button "Insert last publications"
• In the tinymce, the illustration is well displayed
• save the content
• preview the content : the illustration of the news has diseapears :

  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt="" title="Cette image n'existe plus" style="background-image: url('/cms/plugins/core-ui/resources/img/imagenotfound_max132x190.png'); background-position: center;" width="190" height="132">