title: Flutter Inspector Toggle Select Widget mode not working.
body: <p>I have build a Flutter app solely made of Stateless Widgets.<br>
  I run my <code>main.dart</code> (no <em>debug</em> mode) when I toggle the "Toggle Select Widget mode" button, and the widgets tree displays correctly. </p>
  
  <p><strong>Problem</strong>: I am able to click ONE widget in my UI, but then</p>
  
  <ol>
  <li>The Widget tree pane does not show the widget I have clicked. There is no change. </li>
  <li>Afterwards, I am unable to click/select any other widget. </li>
  </ol>
  
  <p>I have tried:  </p>
  
  <ul>
  <li>toggling the Select Widget button off and back on </li>
  <li>rebooting <code>main.dart</code></li>
  </ul>
  
  <p>I use Android Studio 3.1.2. My emulator is an iPhone 6s virtual device (I have also tried on a Nexus Android device, in vain). 
  Here is a <a href="https://imgur.com/a/jZblH9y" rel="nofollow noreferrer">copy of my working screen</a>, should it be useful. </p>
  
  <p>Do you have an idea what I did wrong? Thanks much. </p>