title: Modal (fixed element) unscrollable after input focus in iOS safari
body: <p>I have spent about 8 hours now try solve this issue, any help is appreciated!</p>
  
  <p>How to reproduce:</p>
  
  <ul>
  <li>Open a modal that's higher than the window height (in an iPhone)</li>
  <li>Focus an input field</li>
  <li>Press "done" in the iOS keyboard </li>
  </ul>
  
  <p>You can no longer scroll to the bottom of the modal</p>
  
  <p>jsbin: 
  <a href="https://jsbin.com/hagiyojufu" rel="nofollow">https://jsbin.com/hagiyojufu</a>
  ( <a href="https://jsbin.com/hagiyojufu/1/edit?html,css,js,output" rel="nofollow">https://jsbin.com/hagiyojufu/1/edit?html,css,js,output</a> )</p>