Changeset/buffers when proxying models with computeds

controllers.application.js

import Ember from 'ember';
import Proxy from 'ember-buffered-proxy/proxy';
import Changeset from 'ember-changeset';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  model: Ember.computed(function() {
    return Ember.Object.extend({
      fullName: Ember.computed('name', function() {
         return `FullName: ${this.get('name')}`;
      })
    }).create({ name: 'Tomster'});
  }),
  
  buffer: Ember.computed('model', function() {
    return Proxy.create({ content: this.get('model')})
  }),
 
  changeset: Ember.computed('model', function() {
    return new Changeset(this.get('model'));
  })
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
Model
<br>
<div>Name: {{model.name}}</div>
<div>computed: {{model.fullName}}</div>
<br>
Buffer
<div>Buffer-Name: {{buffer.name}}</div>
<div>computed: {{buffer.fullName}}</div>
<br>
<br>
Changeset
<div>Changeset-Name: {{changeset.name}}</div>
<div>computed: {{changeset.fullName}}</div>
<br>

<button onClick={{action (mut model.name) 'Tomhuda'}}>Change model</button>
<button onClick={{action (mut buffer.name) 'Tomhuda'}}>Change buffer</button>
<button onClick={{action (mut changeset.name) 'Tomhuda'}}>Change changeset</button>
{{outlet}}
<br>
<br>
<p>Outcome: buffering model computeds does not work on proxy-buffer nor on ember-changeset</p>
<p>related <a href="https://github.com/poteto/ember-changeset/issues/159#issuecomment-288213869">comment</a> from @sugarpirate on ember changeset </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",
    "ember-buffered-proxy": "1.0.0",
    "ember-changeset": "1.5.0-beta.0"
  }
}