There is a bug with 1.18.1 on spigot, paper & purpur where defining worlds in the bukkit.yml just does nothing. We have reported this to spigot multiple times along with other developers, but they keep shooting it down, so we're just going to fix it for now on our end. When the server loads up, Iris checks the bukkit.yml and checks all iris worlds to see if they are loaded or not. If they arent loaded, Iris will do bukkit's job and create them for you. Once this bug is fixed Iris will continue to work fine.

• Iris worlds now auto load when specified in the bukkit.yml
• Set headless default to off. There are issues with headless pregeneration with custom colors currently we are working on a fix for this stay tuned!