I am having the same problem. When I edit or try to create a new page and hit the update button (or publish) the panel waits a moment and then kicks me out of the page I am on straight to the front page of the website. When going back to the page none of the updates have been made and the page has returned to normal or is an empty draft page.
I thought this was limited just to pages but I attempted to see if it was plugins that were causing it and the simple act of deactivating or activating plugins can do the same thing. It is not consistent though and once in a very rare while things will get through. It is even blocking me creating new posts!
My blog is https://www.rpgknights.com
I am running WordPress 4.2.2 on a hostpapa.com hosted site. I have backed it up and reinstalled WordPress and the problem is continuing.
I have turned all plugins off and the problem continued.
Please help!