mx.states.AddItems.addItemsToArray fails with RichText & ParagraphElement

When a state is used to exclude a ParagraphElement in a RichText in mxml an RTE is caused when the state wants to include the ParagraphElement. "TypeError: Error #1034: Type Coercion failed: cannot convert flashx.textLayout.elements::TextFlow@dad6369 to Array"

Error occurs in: mx.states.AddItems.addItemsToArray()

Example bellow works when state is "stateToExclude" but fails when "normal"

...
<s:states>
        <s:State name="normal"/>
        <s:State name="stateToExclude"/>
</s:states>
...
<s:RichText>
     <s:p>First paragraph.</s:p>
     <s:p>Second paragraph.</s:p>
     <s:p excludeFrom="stateToExclude">Optional paragraph</s:p>
</s:RichText>
...