Divi visual editor does not work when loading mapped URL

The Divi visual editor button in the wp-admin wants to direct to the mapped domain permalink, but the editor does not launch at that URL. It works fine however when launched at the original unmapped URL. For example:
Mapped http://positivelyfitt.com/about/?et_fb=1 does not work
Original https://myfitranx.com/positivelyfitt/about/?et_fb=1 works fine

So the question is: can we somehow force the Divi visual editor button in the wp-admin to direct to the original unmapped URL instead of the mapped URL?