title: Unintended zoom with PWA on iOS after device unlock
body: <p>Perhaps similar to this question, although not related to rotation:
  <a href="https://stackoverflow.com/questions/50977145/unintended-zoom-on-orientation-change-in-pwa-but-not-mobile-safari-ios">unintended zoom on orientation change in PWA but not mobile safari iOS</a></p>
  
  <p>I have an issue where if my PWA app is left running (say, on an iPad as a Kiosk) and the device sleeps / locks, upon unlocking / waking the app decides to zoom-in to a section in the middle of the page. It's not even a smooth zoom-in, it's like a badly animated 90s JPG loading checkerboard sequence as it 'switches' from one zoom level to another.</p>
  
  <p>I've tried HTML meta tags:</p>
  
  <pre><code>&lt;meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no, maximum-scale=1.0, user-scalable=no"&gt;
  </code></pre>
  
  <p>I've tried CSS touch-action:</p>
  
  <pre><code>touch-action: none;
  </code></pre>
  
  <p>But nothing seems to stop it. Interestingly, with the app running in the Mobile Safari browser and not as a PWA, the issue does not occur.</p>