Ember 1.13 regression - render doesn't use an ObjectController

controllers.application.js

import Ember from 'ember';
export default Ember.Controller.extend({
  myModel: Ember.computed(function () {
    return {firstName: 'Miguel'};
  })

  // "addon-with-disable-proxy-controllers": "file:../addon-with-disable-proxy-controllers"
});

something.hbs

<div>Ember.VERSION {{Ember.VERSION}}</div>
<div>Proxy: {{firstName}}</div>
<div>Non proxy: {{model.firstName}}</div>

templates.application.hbs

<h2 id="title">Welcome to Ember</h2>
<div> You can toggle between 1.12 and 1.13 to compare the behavior</div>
{{render 'something' myModel}}
{{outlet}}
 

templates.something.hbs

<div>Ember.VERSION {{Ember.VERSION}}</div>
<div>Proxy (firstName): {{firstName}}</div>
<div>Non proxy (model.firstName): {{model.firstName}}</div>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "2.5.2",
    "ember-template-compiler": "1.13.13"
  }
}