title: Service Worker returns "site can not be reached" on only one device
body: <p>I've been making a progressive web app.</p>
  
  <p>I've registered a service worker for offline access. However, in doing so, I seem to have blocked access somehow for one android device, which says "This site cannot be reached" when visiting it.</p>
  
  <p>Accessing it from a computer or another device works fine.</p>
  
  <p>I wondered if the problematic device is trying to access a now outdated service worker/cache.</p>
  
  <p>I've tried clearing the cache on the Chrome app but still have the same problem.</p>
  
  <p>Anyone got any ideas?</p>