TextFlow Direction

Hello,

I am building an editor component and there is a control that lets the user toggle the direction of the text flow between

left to right and right to left.

My simple code for this is as follows:

        override public function execute_off() : void
        {
            this.label = "\u2192";
            textArea.textFlow.direction = Direction.LTR;
        }
       
        override public function execute_on() : void
        {
            this.label = "\u2190";
            textArea.textFlow.direction = Direction.RTL;
        }

Where "this" in this instance is a class that extends ToggleButton.

This feature works until I add some other formatting to some text.  From that point forward, setting the textArea.textFlow.direction property is ignored.

Is this a bug or are there better ways to go about doing this?