title: Strange line on Google Chrome after openning popup, how to avoid it?
body: <p>When I open and close a magnific-popup that contains a youtube video, a line is shown in my page. You can see it here:</p>
  
  <p><img src="https://i.stack.imgur.com/jRbuH.jpg" alt="Strange line on Chrome"></p>
  
  <p>You can reproduce this on <a href="https://demo.socialcondo.com.br" rel="nofollow noreferrer">https://demo.socialcondo.com.br</a></p>
  
  <p>Click on the link on the third panel, the blue one. Like here</p>
  
  <p><img src="https://i.stack.imgur.com/1Qs7j.jpg" alt="Open video"></p>
  
  <p>The close the popup and go back to top. The line will be there.</p>
  
  <p>I tested it on Windows 7 and in Mac OS with Google Chrome.</p>
  
  <p>This doesn't happen on Firefox.</p>
  
  <p>What is causing this behavior?</p>
  
  <p>Edit: 
  Thie line doesn't always appear at the same position and have the same size and colors. If you try to reproduce it consider it. But it always appears in the same region.</p>
  
  <p>Edit 2: This is not reproducible in Linux</p>