Why multiple RichEditableText instances cannot share the same TextFlow model ?

I am new to TLF.  From what I understand textFlow is simply a data model.  It didn't make sense to me that why multiple RichEditableText instances cannot share the same textFlow.

<?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/halo" minWidth="1024" minHeight="768"
    creationComplete="onCreationComplete()">
    <fx:Script>
        <![CDATA[
            import spark.primitives.RichEditableText;
            import flashx.textLayout.conversion.TextConverter;
            import flashx.textLayout.elements.TextFlow;
            private var markup:XML = <TextFlow columnCount="inherit" columnGap="inherit" columnWidth="inherit" lineBreak="inherit" paddingBottom="inherit" paddingLeft="inherit" paddingRight="inherit" paddingTop="inherit" paragraphSpaceBefore="20" verticalAlign="inherit" whiteSpaceCollapse="preserve" xmlns="http://ns.adobe.com/textLayout/2008"><p><span>Hello</span></p></TextFlow>;
            private function onCreationComplete():void
            {
                var textFlow:TextFlow = TextConverter.importToFlow(markup, TextConverter.TEXT_LAYOUT_FORMAT);
               
                var richEText:RichEditableText = new RichEditableText();
                richEText.width = 400;
                richEText.height = 500;
                richEText.textFlow = textFlow;
                addElement(richEText);
               
                var richEText2:RichEditableText = new RichEditableText();
                richEText2.width = 300;
                richEText2.height = 200;
                richEText2.textFlow = textFlow;
                addElement(richEText2);
            }           
        ]]>
       
    </fx:Script>
</s:Application>

This generates the following run-time error:

Error: Error #1502: A script has executed for longer than the default timeout period of 15 seconds.
    at flashx.textLayout.elements::TextFlow/http://ns.adobe.com/textLayout/internal/2008::normalize()
    at flashx.textLayout.factory::TextFlowTextLineFactory/createTextLines()
    at flashx.textLayout.container::TextContainerManager/compose()
    at flashx.textLayout.container::TextContainerManager/updateContainer()
    at spark.primitives::RichEditableText/updateDisplayList()
    at mx.core::UIComponent/validateDisplayList()
    at mx.managers::LayoutManager/validateDisplayList()
    at mx.managers::LayoutManager/doPhasedInstantiation()
    at mx.managers::LayoutManager/doPhasedInstantiationCallback()

I am using SDK 9091.  Any help is appreciated.

The way to get around this so far is to make a deepcopy of your textFlow for every richEditableText instance you need.

Thanks,

Heather