title: Symfony - CSRF not working in some mobile browsers
body: <p>I have symfony form that send via ajax and persist/update it on database.  </p>
  
  <p>this process work correctly in desktop browsers but on mobile browsers (almost safari and another apple browsers) get error: <code>This CSRF token is invalid. Please try to resubmit the form</code></p>
  
  <ul>
  <li>I use <code>{{ form_end(form) }}</code> twig (my symfony version is 3.2)</li>
  <li>I increased both <code>max_input_vars</code> and <code>upload_max_filesize</code> properties of my <code>php.ini</code>.</li>
  <li>My database is up to date.</li>
  <li>I cleared my app and browser caches.</li>
  <li><strong>This Work Correctly In Desktop Browsers</strong></li>
  <li><strong>This Error In Apple Browsers</strong></li>
  </ul>