If it ever says it was updated from another source and asks if you want to reload the page... say 'no'
I'm not sure what causes this, but it must be a delayed reaction from when we create a blank page before opening the page and adding content. So when you click 'yes' it reverts back to the blank page.
We haven't reproduced it, but from the description it seems that would be the cause. We'll continue to try to find a way to reproduce it so that we can get it fixed.