title: Text debris in Qt frameless transparent window
body: <p>I'm trying to create a frameless transparent window with Qt and its go-bind(<a href="https://github.com/therecipe/qt" rel="nofollow noreferrer">https://github.com/therecipe/qt</a>).</p>
  
  <p>The problem I have faced is that the debris of the text remains in the frameless transparent window. Please look at Gif(<a href="https://i.imgur.com/47OC7ps.gif" rel="nofollow noreferrer">https://i.imgur.com/47OC7ps.gif</a>).</p>
  
  <p>The characteristics of the problem I confirmed are the following.</p>
  
  <ul>
  <li>Problems only occur in resized windows. (But not 100%)</li>
  <li>Only the text initially
  displayed in the window will remain as debris.</li>
  </ul>
  
  <p>This problem can be avoided by explicitly calling <code>Hide()</code>, <code>Show()</code> in QMainWindow itself, but performance problems occur.</p>
  
  <p>I expect that there will be some consideration for resizing the application since the problem occurs only in resized window.</p>
  
  <p>Are there any ideas?</p>
  
  <hr>
  
  <p>My environment is the following:</p>
  
  <ul>
  <li>Qt: 5.12.0</li>
  <li>My app source code: <a href="https://github.com/akiyosi/goqtframelesswindow" rel="nofollow noreferrer">https://github.com/akiyosi/goqtframelesswindow</a> commit:8d7aa6e</li>
  </ul>