4.2: restore a page after a move does not restore content stored in the page

I use a site with some baldiated page. I created a page with a main_content in a left menu. I validated the page. I moved this page in the top nav bar. I revalidated everything from the home.

Then I restored the whole site before I start this whole process (so without the new page in the left menu). Finally I restored my left menu. The page which was moved apapears... but empty. Only the parent container was restored and not the main_content.