No-go Area (Editor)

While i'm creating a map. These No-go areas that i create just disappear right after creating them, taking the borders with them.

Am i missing something?

No-go areas turn red after you make then no-go areas.

Yeah, but say i create a square, and check the no-go area box. Once i click save, it just goes away. Making me not able to make these no-go areas.

It is bug then.... You arnt doing nothing wrong....

Yeah, It seems to work on Chrome, I was using Opera. Idk if this is for anyone else.
So perhaps this should be moved to the Bug section, but yeah. No more problems for me, simply using a different browser.

Sorry to bother :'3