Not sure what you mean by "an unfilled rectangle." Drawn in copper track? Silkscreen? As a Solid Region? Which Gerber viewer? Can you post the URL of an example footprint that demonstrates this? Thanks.

Hi Issue confirmed, we fixed this at v5.9, v5.9 is under testing now. Thanks for the report!

Does this problem still exist? How can I work around this while it's not fixed?

Use gerbv as your Gerber viewer: [https://docs.easyeda.com/en/Export/Export-Gerber-Files/index.html#Gerber-View](https://docs.easyeda.com/en/Export/Export-Gerber-Files/index.html#Gerber-View) If they're ok in gerbv then they should be good for JLCPCB.

hi, please right-click this footprint and update it.

@UserSupport Updating worked. Thank you!