Railtie Initializer not running in plugin

Question

I recently switched from the gem version of resources_controller to a plugin as the gem version relied on git.

Inside the vendor/plugins/plugin/lib/plugin.rb file, the Railtie is as follows:

module Ardes
  module ResourcesController
    class Railtie < Rails::Railtie
      initializer 'ardes.resources_controller' do
        ActiveSupport.on_load(:action_controller) do
          extend Ardes::ResourcesController
          include Ardes::ResourcesController::RequestPathIntrospection
        end

        ActiveSupport.on_load(:active_record) do
          include Ardes::ActiveRecord::Saved
        end
      end
    end
  end
end

I've added a require 'resources_controller' in one of my initializers and it's properly loading this file. The problem is that although the Railtie is evaluated (a puts in the class block will hit), it never seems to actually call the initializer block itself. This is important of course as this is where it extends ActionController to include the resources_controller_for method.

This question is appears to have come up here and here. Though in both cases they found other ways around the problem and no direct answer was given for why the block wasn't being called.

From what I can tell in the Rails docs you can name your initializer block anything you'd like and it should run. I don't think it matters, but I first noticed the problem when running in production rails s -e production though I believe the same problem exists in development mode.

What may be going on?

For reference, full plugin is here: https://github.com/ianwhite/resources_controller