Steps to reproduce:

• in the backoffice
• create and publish a content
• edit this content, click on the cross to close the editor to create a draft
• view the content on the backoffice, click on the edit button on the right.
• the draft conflict box (EZP-25465) should appear
• click on "new draft" (on select and item and click on the edit button)
• during the transition, the box content's first disappear before the actual transition is made.