AEM 6.1 : iFrame does not render on IE 11,etc

Hi, I am having trouble displaying iFrame content on IE. So it works fine on other browsers. From what i can see on the network on the browser, the content is returned with the response, just that it does not get rendered, if i inspect iframe element after load, the content is not there.

FYI in the header response, the server also returns an "Access-Control-Allow-Origin : *", to cater for CORS. So now I am not sure what else I need to do to make it work.

code snippet below

<iframe src="https://embed.iono.fm/epi/495316"

  width="100%" height="135"

  frameborder="0"

  class="podcast-iono-image__iframe">

  <a href="https://iono.fm/e/495316">Content hosted by iono.fm</a>

</iframe>