"willRender" doesn't fire when you expect it to

components.my-component.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  show: true,
  
  actions: {
    toggle() {
      this.toggleProperty('show');
    }
  }
});

Ember.subscribe("render", {
  before(name, timestamp, payload) {
    console.log('INSTRUMENTATION TRIGGERED');
  }
});

templates.application.hbs

<h3>"willRender" doesn't fire when you expect it to</h3>

<p>Toggle the component. Instrumentation is triggered when the component is added but not when it's removed (check the console). Instrumentation code is in the application controller module.</p>

<button {{action "toggle"}}>Toggle Component</button>
{{#if show}}
  {{my-component}}
{{/if}}
<br>
<br>

templates.components.my-component.hbs

My Component

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "alpha",
    "ember-data": "2.7.0",
    "ember-template-compiler": "alpha"
  },
  "addons": {}
}