Server generating villages despite generate-structures=false in server.properties

So i am working on this project. And had used a flat world setting to generate air only worlds. It worked like a charm. But then i noticed villages spawning ontop of the void. So i turned off structure generation in the server config. Hoping it would fix it. But they still appear.

Steps:
1: create a minecraft server wich is flat. And air only
2: turn off generate structures in the config. And start server
3: walk/ teleport around to see them still spawn