title: OpenFileDialog does sometimes show empty navigation
body: <p>I show an OpenFileDialog with the following code:</p>
  
  <pre><code>var fileBox = new Microsoft.Win32.OpenFileDialog
  {
      InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop),
      Filter = "All files (*.*)|*.*",
      FilterIndex = 1,
      Multiselect = true,
      CheckPathExists = true,
      CheckFileExists = true
  };
  var fileSelected = fileBox.ShowDialog(owner);
  </code></pre>
  
  <p>Mostly this works perfectly. But from time to time, the navigation at the left in the Dialog is shown as white rectangle. You can see that in this printscreen:</p>
  
  <p><a href="https://i.stack.imgur.com/eqHeT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eqHeT.png" alt="enter image description here"></a></p>
  
  <p>Does someone have an idea, why this appears?</p>