title: Callback triggered by interactive radio button not working in Android/iOS App but does work on Desktop App
body: <p>Hello dear slack community,</p>
  <p>I was curious if someone also has noticed the following bug with the Slack Interactivity API.</p>
  <p>Basically I created some radio buttons with the <a href="https://app.slack.com/block-kit-builder" rel="nofollow noreferrer">https://app.slack.com/block-kit-builder</a>, sent them via my PHP app and they successfully reach my slack client (both Android/iOS and desktop clients)</p>
  <p>When I click on one of the radio buttons on the desktop client it successfully calls the URL defined in the Slack backends <code>Interactivity &amp; Shortcuts</code> section but when I do the same on the Android/iOS App nothing happens (no request is being sent to the defined URL)</p>
  <p>And yes, my receiving app behind the <code>Request URL</code> always returns a 200.</p>
  <p>Any idea why it doesn't anymore?</p>