I have routed a small board in EasyEDA editor and exported it to the Gerber File. Then I checked it with EasyEDA gerber viewer and gerbv utility. It was ok. Then I decided to order a PCB with JLCPCB and in the preview window I've noticed that a copper area rendered incorrectly. Look at the upper pad of R5 - there was no such geometry in the project.

The copper area clearance is 30mil on this layout. I've changed clearance to 29mil and JLCPCB preview rendered it correctly. Look at the same region:

I'm sure that this behavior was not intended and I don't know whoose bug is this: EasyEDA or JLCPCB but I've noticed it too late and already ordered PCB with this bug. The question is - will my PCB contain the bug as in the JLCPCB preview? Or it is just the preview render problem? Here is the project https://easyeda.com/nwfalls/Sound-Impairment-Monitor. Clearance is currently set to 29mil. If you want to try to reproduce the bug, you have to set top layer copper area clearance to 30mil.