[Mirroring] Form error toolTip is on the wrong side

Steps to reproduce:
1. Compile and run this app:

<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>
<mx:StringValidator source="

" property="text" minLength="2" />
<mx:ZipCodeValidator source="

" property="text" />
</fx:Declarations>

<s:controlBarContent>
<s:Button label="RTL" click="setStyle('layoutDirection', 'rtl');setStyle('direction', 'rtl')" />
<mx:Spacer width="100%" />
<s:Button label="LTR" click="setStyle('layoutDirection', 'ltr');setStyle('direction', 'ltr')" />
</s:controlBarContent>

<mx:Form>
<mx:FormItem required="true" label="Name">
<mx:TextInput id="shippingName" />
</mx:FormItem>
<mx:FormItem required="true" label="ZIP Code" errorColor="green">
<mx:TextInput id="shippingZipCode" maxChars="10" restrict="0-9 -" />
</mx:FormItem>
</mx:Form>

</s:Application>

2. Click "RTL"
3. Get the error toolTip to show up in the form field

Actual Results:

The error toolTip is on the right.

Expected Results:

The error toolTip should be on the left.

Workaround (if any):