Post/Page Content reverting from Avia to Basic

Background: We are seeing some real peculiarities in pages, where pages that were done and complete a long time ago started re-directing back to the home page. That lead to a bigger discovery that what was a finished page using the Avia editor had reverted back to the content before being adapted in the Avia editor.

I know it sounds wild and crazy, but it really is strange and we can reproduce it on many pages. It is almost like a switch on the back-end is confused about where to pull the content from, the posts table or the posts meta table. Many pages work fine, but others that had always worked in the past now are running into that redirect issue and when the page is loaded in the back-end, it does not show any of the changes. There seems to be no discernible pattern. It did seem to start when we did the update to Enfold 3.4 from 3.1. I have since updated to 3.4.6, hoping it might fix the issue, but it does not seem to make any difference. I have tried turning off all plugins, but that also had no effect.

I know your reluctance to get into deep issues on this support channel, but can you help me understand the methodology that is used to tell WP which source is loaded for a page/post?