AIR Android : text overlaps near line 750 and after in a text.flash.TextField (spark.skins.mobile.TextAreaSkin)

Hello,

On my Nexus 5, the text overlaps in a spark Textarea with spark.skins.mobile.TextAreaSkin (use flash.text.TextField) near line 750 and after (ScrollBar near 25% height)

<?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"
  creationComplete="creationCompleteHandler(event)">
  <fx:Script>
  <![CDATA[
   import mx.events.FlexEvent;
   private function creationCompleteHandler(event:FlexEvent):void
  {
   var urlLoader:URLLoader = new URLLoader();
   var request:URLRequest = new URLRequest("http://www.adobe.com/products/air.html");
  urlLoader.addEventListener( Event.COMPLETE, chargementComplet );
  urlLoader.load( request );
  }
   private function chargementComplet(pEvt:Event):void {
  myTextField.text = pEvt.target.data;
  }
   private function skbAct( event:Event ):void
  {
  myTextField.height=800;
  }
   private function skbDeact( event:Event ):void
  {
  myTextField.height=1600;
  }
  ]]>
  </fx:Script>
  <fx:Style>
  @namespace s "library://ns.adobe.com/flex/spark";
  s|TextArea{
  skinClass: ClassReference("spark.skins.mobile.TextAreaSkin");
  }
  </fx:Style> 
  <s:TextArea width="800" height="1600" id="myTextField" softKeyboardActivate="skbAct(event)" softKeyboardDeactivate="skbDeact(event)"/>
</s:Application>

I don't know if it's a flash bug or a flex bug but the Apache Flex team says : "This looks like a bug with Flash, which Apache Flex does not have control over. Creating a bug with Adobe would be best."

Thanks