Today at around 12 noon (25/5/2018) I saved my project and went about my daily business.
When I logged back in some 12 hours later all the Copper Areas on both sides of the PCB had disappeared, a total of 14 Copper Areas.
Somewhat upset, but not deterred, I recalled an earlier version via the Histories Record function and continued with my project. However, after saving and reloading the project I found all 12 of the top Copper Areas had disappeared, but not the bottom 2
I believe we had an update today and this may well be the problem?
Frendor.
Chrome
66.0.3359.181
Windows
10
EasyEDA
5.5.9