The helpers of Action Text are added to a couple of non-reloadable
base classes:

  initializer "action_text.helper" do
    %i[action_controller_base action_mailer].each do |abstract_controller|
      ActiveSupport.on_load(abstract_controller) do
        helper ActionText::Engine.helpers
      end
    end
  end

Therefore, it does not make sense that they are reloadable themselves.

For the same price, we can also make the models non-reloadable, thus
saving parent applications from the unnecessary work of reloading this
engine.

We did this for turbo-rails as well.