IP Anaonymization through munchkin

Hi All,

Has any one tried the IP anonymization through munchkin? As you know, in the recent product release Marketo introduced IP anonymization as a part of munchkin code. See here:

Release Notes: Spring '18 - Marketo Docs - Product Documentation

http://developers.marketo.com/javascript-api/lead-tracking/configuration/

I've configured the munchkin code like below:

<script type="text/javascript">
(function() {
  var didInit = false;
  function initMunchkin() {
    if(didInit === false) {
      didInit = true;
      Munchkin.init('xxx-xxx-xxx',{'anonymizeIP': true});
  
  }
  var s = document.createElement('script');
  s.type = 'text/javascript';
  s.async = true;
  s.src = '//munchkin.marketo.net/munchkin-beta.js';
  s.onreadystatechange = function() {
    if (this.readyState == 'complete' || this.readyState == 'loaded') {
      initMunchkin();
    }
  };
  s.onload = initMunchkin;
  document.getElementsByTagName('head')[0].appendChild(s);
})();
</script>

and after page visit (with above code), I'm still able to see the correct IP address in the "Visit web page" activity? Am I doing something worng here?

Regards,

Amit