[Resolved] Divi theme builder translation disappear

Background of the issue:
I have a website that has been online for months using the Divi theme builder. Everything was working well, but recently, the Divi theme builder layout for translations has been resetting. When this happens, I have to reload the translations recorded in the library. The issue can be seen on this page: hidden link

Symptoms:
The header, footer, and post body layout are erased for one or both translated languages.

Questions:
Why is the Divi theme builder layout for translations resetting?
How can I prevent the header, footer, and post body layout from being erased for translated languages?