No Prompt in TextInput when layoutDirection set to RTL (Mobile)

When layoutDirection set to RTL to Textinput the prompt text does not appear.

Code Example:
<?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">

<s:TextInput prompt="Ori" layoutDirection="ltr"/>

<s:TextInput prompt="Ori" layoutDirection="rtl" top="50"/>

</s:Application>

Screenshot:
http://screencast.com/t/HjNAd7PQaVG