I am using 1.8.4 but this also happened when using 1.7.1.
I am trying to add content to a page. I added 2 1/2 columns and put text box in left one and photo in the right one and update. The right one disappears. Do it again and it stays. Add a special heading and a full width box below and update. Everything disappears except the lefthand text box. Try again and add more and update, ok content is still there, do one more edit with an update and all disappears but 1/2 col and text box. Quit for night and reboot this am and same thing then upload 1.8.4 and same thing. Built another site with Enfold and several pages on this site and this never happened before.