Bug with loading state

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('my-account', function() {
    this.route('services');
  });
});

export default Router;

routes.my-account.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
  	return new Ember.RSVP.Promise(resolve => Ember.run.later(resolve, 1000))
  }
});

routes.my-account.services.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
  	return new Ember.RSVP.Promise(resolve => Ember.run.later(resolve, 1000))
  }
});

templates.application.hbs

{{outlet}}

templates.index.hbs

{{link-to 'my account' 'my-account'}} |
{{link-to 'my account/services' 'my-account.services'}}

templates.loading.hbs

LOADING...

templates.my-account-loading.hbs

My Account LOADING...

templates.my-account.hbs

<h2>My account</h2>
{{link-to 'Back' 'index'}} |
{{link-to 'Services' 'my-account.services'}}
{{outlet}}

templates.my-account.services-loading.hbs

My Account / Services LOADING...

templates.my-account.services.hbs

<h3>Services</h3>

twiddle.json

{
  "version": "0.10.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}