title: PrimeNG p-multiSelect did not display selected values
body: <p>My <code>p-multiSelect</code> in the tamplate:</p>
  <pre><code>&lt;p-multiSelect
      name=&quot;selectedItens&quot; 
      [options]=&quot;vlans&quot; 
      [(ngModel)]=&quot;selectedItens&quot; 
      optionLabel=&quot;name&quot; 
  &gt;&lt;/p-multiSelect&gt;
  </code></pre>
  <p>In the ngOnInit I havet this code to populate the <code>selectedItens</code>:</p>
  <pre><code>this._myService
  .getSelectedItens(this.myDto.id)
  .pipe()
  .subscribe(data =&gt; {
      this.selectedItens = data[&quot;result&quot;];
  });
  </code></pre>
  <p>The <code>selectedItens</code> is an object like this:</p>
  <pre><code>name: string | undefined;
  active: Boolean | undefined;
  id: number;
  </code></pre>
  <p>I checked the return value witch console.log and everything looks right, but my multSelect look like this:
  <a href="https://i.stack.imgur.com/fqD1J.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fqD1J.png" alt="enter image description here" /></a></p>
  <p><code>data[&quot;result&quot;]</code> sample:</p>
  <blockquote>
  <p>0: {name: &quot;V-123&quot;, active: true, id: 3}</p>
  <p>1: {name: &quot;V-832&quot;, active: false, id: 333}</p>
  <p>2: {name: &quot;V-220&quot;, active: false, id: 6}</p>
  </blockquote>
  <p><strong>All options appear normally in the list, but when I click on to select any more fields the checkbox is not checked despite working (the item clicked is added to the array).</strong></p>
  <p><strong>If I remove the <code>[(ngModel)]=&quot;selectedItens&quot;</code> everything works fine, but I need to show the itens that already beend selected.</strong></p>