I am having a strange behaviour happening to the Cornerstone editor.
Basically whenever I try to hit save the first or second time, the page output shows empty and the image attached to the page also disappears from the wordpress backend.
Here is a VIDEO sample of the error: link
It’s makes any updating virtually impossible, I had to recreate page over and over again to make it work.
I tried to disable the plugins aside from cornerstone to isolate the error, but no luck.
Using the default wordpress theme seems to work.