onChange weirdness

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
    onChange() {
			this.set('msg', 'i heard a change event');
    },
  },
});

templates.application.hbs

<form>
	{{input type="radio" onChange=(action 'onChange')}}
	<button type="reset">Reset</button>
</form>

<p>{{msg}}</p>

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}