title: Flutter - Container BoxShadow disappears on scroll in a ListView
body: <p>This is what my Container looks like:</p>
  
  <pre><code>new Container(
          width: 500.0,
          height: 250.0,
          padding: new EdgeInsets.fromLTRB(20.0, 40.0, 20.0, 40.0),
          decoration: new BoxDecoration(
            color: const Color(0xFF66BB6A),
            boxShadow: [new BoxShadow(
              color: Colors.black,
              blurRadius: 20.0,
            ),]
          ),
          child: new Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              new Container(
                padding: new EdgeInsets.fromLTRB(0.0, 0.0, 0.0, 10.0),
                child: new Text("Testtext", style: new TextStyle(fontSize: 30.0, fontFamily: "Barrio", color: new Color.fromARGB(255, 230, 230, 230))),
              ),
            ]
          ),
        ),
  </code></pre>
  
  <p>It is inside a ListView with some other Containers. As soon as I start scrolling through the ListView, the shadow just disappears. When loading the view tho, it appears correctly.</p>
  
  <p>Any thoughts on this problem?</p>
  
  <p>Thanks</p>