computed property bug

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
	debounceSearchText: Ember.observer('searchText', function() {
    console.log('debounceSearchText');
    this.setDebouncedSearchText();
  }),

  setDebouncedSearchText() {
    console.log('setDebouncedSearchText');
    var searchText = this.get('searchText');
    this.set('debouncedSearchText', searchText);
  },
  
  suggestions: Ember.computed('debouncedSearchText', function() {
    console.log('Y I NO RUN?');
    var debouncedSearchText = this.get('debouncedSearchText');
    return [debouncedSearchText];
  })
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}
<br>
<br>

templates.components.my-component.hbs

{{input value=searchText}}

twiddle.json

{
  "version": "0.4.6",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.5/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember-template-compiler.js"
  }
}