href property of LinkComponent/LinkView is not recomputed when a promise resolves (link-to)

adapters.application.js

import DS from 'ember-data';
export default DS.RESTAdapter.extend();

controllers.application.js

import Ember from 'ember';

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

initializers.mockjax.js

function setupMockjax() {
 $.mockjax({
      url: "/posts",
      // responseTime: 200,
      responseText: { posts: [{ id: 1, author: 1 }, { id: 2, author: 2}] },
    });

    $.mockjax({
      url: "/users/1",
      responseTime: 200,
      responseText: { user: { id: 1, email: 'foo' } }
    });

    $.mockjax({
      url: "/users/2",
      responseTime: 200,
      responseText: { user: { id: 2, email: 'bar' } }
    });
}

export default {
	name: 'mockjax',
	initialize: function(application) {
    application.deferReadiness();
    $.getScript('https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js').then(() => {
      setupMockjax();
      application.advanceReadiness();
    });
  }
};

models.post.js

import DS from 'ember-data';

export default DS.Model.extend({
  author: DS.belongsTo('user', { async: true }),
});

models.user.js

import DS from 'ember-data';

export default DS.Model.extend({
  email: DS.attr('string'),
});

router.js

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

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

Router.map(function() {
  this.route('user', { path: '/users/:email' });
});

export default Router;

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
 model() {
    return this.store.findAll('post');
  }
});

routes.user.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    return this.store.find('user', { email: params.email} ).get('firstObject');
  },
  
  serialize(model) {
    return model.get('email');
  }
});

serializers.application.js

import DS from 'ember-data';
export default DS.RESTSerializer.extend();

templates.application.hbs

<h1>Link-to and Route#serialize issue</h1>
<br>
<br>
{{outlet}}
<br>
<br>

templates.index.hbs

 {{#each model as |m|}}
	{{#link-to 'user' m.author}}
    author ({{m.author.email}})
  {{/link-to}}
	<br>
{{/each}}

templates.user.hbs

{{model.email}}
{{link-to "back" 'index'}}

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-data": "canary",
    "ember-template-compiler": "canary"
  }
}