AdvancedDataGrid changing dataprovider bug infinite loop

Question

Make the second column width like this image and then click on addRow1:
<code>
<?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"
xmlns:mx="library://ns.adobe.com/flex/mx"
>
<fx:Declarations>
<s:ArrayCollection id="dp">
<fx:Object descripcion="descripcion1" />
<fx:Object descripcion="descripcion2" />
<fx:Object descripcion="descripcion3" />
<fx:Object descripcion="descripcion4" />
</s:ArrayCollection>
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
protected function btnAceptar_clickHandler(event:MouseEvent):void {
var aux:ArrayCollection = new ArrayCollection(dp.toArray());
var obj:Object = new Object();
obj.descripcion = "descripcion" + dp.length;
aux.addItem(obj);
dp = aux;
protected function button1_clickHandler(event:MouseEvent):void {
var obj:Object = new Object();
obj.descripcion = "descripcion" + dp.length;
dp.addItem(obj);
]]>
</fx:Script>
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:Panel>
<mx:AdvancedDataGrid id="grilla" dataProvider="{dp}" width="100%" height="100%"
horizontalScrollPolicy="auto"
>
<mx:columns>
<mx:AdvancedDataGridColumn dataField="descripcion" />
<mx:AdvancedDataGridColumn dataField="descripcion" />
</mx:columns>
</mx:AdvancedDataGrid>
</s:Panel>
<s:Button label="addRow1" click="btnAceptar_clickHandler(event)" />
<s:Button label="addRow1" click="button1_clickHandler(event)" />
</s:Application>
</code>

Answer 1

When the width property is not used, it fails. I can't simplify more than this sorry.
Steps:
click on Fail button
<?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"
     xmlns:mx="library://ns.adobe.com/flex/mx"
     width="300" height="300"
     >
     <fx:Declarations>
          <s:ArrayCollection id="dp">
               <fx:Object description1="description" description2="description"/>
               <fx:Object description1="description" description2="description"/>
               <fx:Object description1="description" description2="description"/>
               <fx:Object description1="description" description2="description"/>
          </s:ArrayCollection>
     </fx:Declarations>
     <fx:Script>
          <![CDATA[
               import mx.collections.ArrayCollection;
               protected function fail_clickHandler(event:MouseEvent):void {
                    var obj:Object = new Object();
                    obj.descripcion = "description";
                    var aux:ArrayCollection = new ArrayCollection(dp.toArray());
                    aux.addItem(obj);
                    dp = aux;
          ]]>
     </fx:Script>
     <s:layout>
          <s:VerticalLayout />
     </s:layout>
     <mx:AdvancedDataGrid id="grid" dataProvider="{dp}" height="160" horizontalScrollPolicy="auto">
          <mx:columns>
               <mx:AdvancedDataGridColumn dataField="description1" width="200"/>
               <mx:AdvancedDataGridColumn dataField="description2" width="5"/>
          </mx:columns>
     </mx:AdvancedDataGrid>
     <s:Button id="fail" label="FAIL" click="fail_clickHandler(event)" />
</s:Application>