title: iOS11 causing CORS Issues in all mobile browsers
body: <p>We were testing our website on iOS devices with iOS11, and noticed that it was breaking, as the browser would not accept responses from our API. Using the remote debugger, we were able to determine that we were getting a CORS permission error, and the response body and HTTP Headers were being stripped.  This seemed to be occurring on all mobile iOS browsers (Chrome/Safari), and continued to occur even after I changed the CORS response header to a wildcard value.  However, every other browser/OS/version of iOS is working perfectly. I have attached the network response from our API, the response headers for our API, and the error we are getting from the console.  </p>
  
  <p>Is there something about iOS11 that might be causing this, or failing that, is there any way I can get further diagnostics?</p>
  
  <p><a href="https://i.stack.imgur.com/LvCCf.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/LvCCf.jpg" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/yUOe5.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/yUOe5.jpg" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/lRP4j.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lRP4j.png" alt="enter image description here"></a></p>