Bukkit.addRecipe() currently silently fails to add both shaped and shapeless recipes when "load: startup" is set in the plugin's plugin.yml file. It would be nice to be able to add recipes with this option enabled.
Im attempting to add the recipes in the plugin's onEnable() method.
EDIT:
I found a work around, this feature request is therefore technically invalid i suppose, because it can be done with existing API.