title: Wpf Caliburn.Micro pressing Close button stops controls update from another thread
body: <p>Why wpf control stops updating when I press and hold Window Close button? I'm using dotnet472. How to fix that?</p>
  <p><a href="https://i.stack.imgur.com/kHNlS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kHNlS.png" alt="enter image description here" /></a></p>