title: Ionic v5: Link from iFrame does not load on iOS
body: <p>I am using an Ionic v5 App on iOS:
  I use an iFrame from the external service of the "Deutsche Bahn":
  <a href="https://www.bahn.de/p/view/home/partnerprogramm/anreiseservice.shtml" rel="nofollow noreferrer">https://www.bahn.de/p/view/home/partnerprogramm/anreiseservice.shtml</a></p>
  
  <pre><code>&lt;iframe src="https://dbaw.specials-bahn.de/149cff8c-5fbd-11ea-8079-00163efd4d20.html" 
          width="100%" 
          height="346" 
          name="iFrame"&gt; 
  &lt;/iframe&gt;
  </code></pre>
  
  <p>I specified </p>
  
  <pre><code>&lt;allow-navigation href="*" /&gt;
  &lt;access origin="*" /&gt;
  </code></pre>
  
  <p>in config.xml, but it is still not possible to open the link of the external iFrame.</p>
  
  <p>Whats the solution for this?</p>