Query params not populated until child model resolves

root.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['test'],
  test: '<not set by route yet>'
});

root.loading.template.hbs

Loading nested route...

root.nested.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return new Ember.RSVP.Promise(function (resolve) {
      setTimeout(() => resolve(), 3000);
    });
  }
});

root.nested.template.hbs

Nested route has loaded!

root.route.js

import Ember from 'ember';

export default Ember.Route.extend({
});

root.template.hbs

<p>STEPS:</p>
<p>- Make sure to hit /root/nested with the "test" query param (ex: /root/nested?test=PARAM)</p>

<p>Root route loaded..</p>
<p>Root query param: {{test}}</p>

{{outlet}}

router.js

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

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('root', function() {
    this.route('nested');
  });
});

export default Router;

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.1.0",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "2.1.0"
  }
}