Android mobile app crashes when you click on a modal

open a popup element (a group with a button inside) as Modal

" PopUpManager.addPopUp(element, true)"

and click on the modal element or the button. The application will stop responding and will crash.

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" applicationDPI="160">
<fx:Script>
<![CDATA[
import mx.core.IFlexDisplayObject;
import mx.managers.PopUpManager;
import spark.components.Button;
protected function openPopup(asModal:Boolean):void

{ grpContainer.enabled = false; var popUpBtn:Button = new Button(); popUpBtn.label = asModal?"Close Modal Button":"Close Modeless Button"; popUpBtn.addEventListener(MouseEvent.CLICK, closePopup); lblMessage.text = ""; PopUpManager.addPopUp(popUpBtn, this, asModal); PopUpManager.centerPopUp(popUpBtn); }

protected function closePopup(event:MouseEvent):void

{ lblMessage.text = "Popup closed !!!" PopUpManager.removePopUp(event.target as IFlexDisplayObject); grpContainer.enabled = true; }

]]>
</fx:Script>
<s:VGroup id="grpContainer">
<s:Button label="Open as Modeless" click="openPopup(false)" />
<s:Button label="Open as Modal" click="openPopup(true)"/>
<s:Spacer height="100%" />
<s:Label id="lblMessage" />
</s:VGroup>
</s:Application>