Ember 2.10.0 rerender regression

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);

    this.data = {
      version: Ember.VERSION
    };
  },

  actions: {
    addData(key) {
      this.get('data')[key] = 'foo';
      this.set('newData', '');
      this.rerender();
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{my-component}}

templates.components.my-component.hbs

{{yield}}
<h3>Data</h3>
<ul>
{{#each-in data as |key value|}}
  <li>
  	{{key}}: {{value}}
  </li>
{{/each-in}}
</ul>
<hr>
<h4>Add Data</h4>
{{input value=newData}}
<button onclick={{action 'addData' newData}}>
	Add
</button>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}