The new online version seems to have troubles with copper area management. Local autorouter does not seem to force a copper area rebuild so large numbers of DRC errors are generated.
Also copper area is never visible on some boards, but not all. I just worked on 3 and 2 were fine but 1 would not show the copper area at all.
Regards,
Ken Horner
Chrome
74.0.3729.131
Windows
10
EasyEDA
6.1.34