Managing focus and blinking

I am having same problem, basically, I am creating multiple textFlows over the same ContainerController, everytime after I dynamicly adding a new textFlow, the focus is on the container, but the cursor just does blink.

here is a piece of code snippet shows how do I add a new textFlow:

   public function execute(event:CairngormEvent):void {

            var tf:TextFlow = new TextFlow();
           
            var undo:UndoManager = new UndoManager();
           
            Log.getLogger('ExamWriter').info("Undo And Redo Item Limit", undo.undoAndRedoItemLimit);
           
            tf.interactionManager = new EditManager(new UndoManager());
           
            tf.interactionManager.selectRange(0,0);
           
            tf.interactionManager.setFocus();
           
           
            tf.fontSize = this.myModel.userPreferences.fontSize;
            tf.color = this.myModel.userPreferences.fontColor;
            tf.fontFamily = "Arial";
            tf.backgroundAlpha = 0;
           
            tf.backgroundColor = this.myModel.userPreferences.backgroundColor;
           
            this.pageContent.pageNum = this.myModel.userResponse.pageContent.length + 1;
            this.pageContent.content = tf;
           
            this.pageContent.content.addEventListener(CompositionCompleteEvent.COMPOSITION_COMPLETE, compositionComplete);
            this.myModel.userResponse.pageContent.addItem(this.pageContent);
           
            this.myModel.userResponse.currentPageNum = this.myModel.userResponse.pageContent.length - 1;
           
            Log.getLogger('ExamWriter').info("AFTER INSERTING NEW PAGE -- PAGE CONTENT LENGTH:: " + this.myModel.userResponse.pageContent.length);
        }

Any suggestion to fix this problem or work-around?

Thank you for your report.  We are working on the problem.