title: Metro bundler not starting automatically with expo start
body: <p>I'm using expo to develop a react native app on Windows 10.</p>
  
  <p>When I run <code>expo start</code> the Metro Builder starts automatically only if disconnected from the internet and with the <code>--offline</code> switch. When connected the <code>--offline</code> switch is useless.</p>
  
  <p>This is the console output, there are no errors or warnings (the same is true for <code>expo start --offline</code>):</p>
  
  <pre><code>expo start
  Starting project at C:\Users\xxx\Projects\my-reactnative-project
  Expo DevTools is running at http://localhost:19002
  Opening DevTools in the browser... (press shift-d to disable)
  </code></pre>
  
  <p>The output in the browser is:
  <a href="https://i.stack.imgur.com/FYXdW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FYXdW.png" alt="Metro browser output"></a></p>
  
  <p>There are no QR code, no link, pressing <code>Tunnel</code>, <code>LAN</code> or <code>Local</code> makes no difference.</p>
  
  <p>I tried reinstalling <code>expo-cli</code> but the problem is still there. This is the output of <code>expo diagnostics</code>:</p>
  
  <pre><code>  Expo CLI 3.13.5 environment info:
      System:
        OS: Windows 10 10.0.18363
      Binaries:
        Node: 12.11.1 - C:\Program Files\nodejs\node.EXE
        Yarn: 1.22.1 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
        npm: 6.11.3 - C:\Program Files\nodejs\npm.CMD
      IDEs:
        Android Studio: Version  3.3.0.0 AI-182.5107.16.33.5199772
      npmPackages:
        expo: ~36.0.0 =&gt; 36.0.2
        react: ~16.9.0 =&gt; 16.9.0
        react-native: https://github.com/expo/react-native/archive/sdk-36.0.0.tar.gz =&gt; 0.61.4
  </code></pre>
  
  <p>Do you know how can I fix this? Thanks in advance.</p>