LOCATION_CHANGING is not dispached when StageWebView(false) on windows

Hello,

on windows,

<script type="text/javascript">document.location="?return=loc";</script>

location changing event

stageWebView.removeEventListener(LocationChangeEvent.LOCATION_CHANGING, onWebViewLocChanging );
private function onWebViewLocChanging( event:LocationChangeEvent ):void
  trace(event.location);
}

is dispatched when I use

var stageWebView:StageWebView = new StageWebView(true);

and it isn't dispatched when I use

var stageWebView:StageWebView = new StageWebView(false);

Thanks