Component double render

components.did-load.js

import Ember from 'ember';

export default Ember.Component.extend({
  willInsertElement() {
    Ember.tryInvoke(this, 'action');
  }
}).reopenClass({
	positionalParams: ['action']
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<p>
  Open your console log and check out the double render error on "appName"
</p>
<p>
  On the other hand, if you move the h1 element from the top to below the did-load, the double-render goes away!
</p>
<br>
<br>
{{did-load (action (mut appName) 'render-1')}}
<p>This won't render</p>
{{outlet}}
<br>
<br>

templates.components.did-load.hbs

{{yield}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}