I am having the same issue…
As @hube2 suggested, I have tried several caching plugins; set a minimum number of rows and deactivated all other plugins (I am only using 3 total for this site, including ACF).
When I try to Preview the page, the content does not show up, so it looks like it’s been deleted, but on the live page it still shows.
Issue can be seen at http://dev.amberladley.com/sponsor/. Gallery at bottom of page (placeholder pics) no longer exist on page, but are still showing up.
