Label doesn't immediately update

[intoxopox]

After a font-size change, Label component doesn't immediately update. Instead it seems to require at least an extra frame.

Example code:

<vbox style="padding: 5px;">
    <button id="myBtn" text="Click Me!" style="font-size: 24px;" />
	<label id="myLabel" text="Testing" style="background-color: #ff0000;" />
</vbox>

package ;

import haxe.Timer;
import haxe.ui.HaxeUIApp;
import haxe.ui.Toolkit;
import haxe.ui.components.Button;
import haxe.ui.components.Label;
import haxe.ui.core.Component;
import haxe.ui.events.MouseEvent;
import haxe.ui.macros.ComponentMacros;
import openfl.display.Bitmap;
import openfl.display.BitmapData;

class Main {
	private static var mainComp:Component;
	private static var bmpData:BitmapData;
	private static var bmp1:Bitmap = new Bitmap();
	private static var bmp2:Bitmap = new Bitmap();
	
    public static function main() {
		
        var app = new HaxeUIApp();
        app.ready(function() {
            mainComp = ComponentMacros.buildComponent("assets/main.xml");
            app.addComponent(mainComp);

            app.start();
			
			var btn:Button = mainComp.findComponent("myBtn");
			btn.onClick = doClick;
        });
		
    }
	
	private static function doClick(e:MouseEvent) {
		var fontSize = Std.random(28) + 10;
		Toolkit.styleSheet.parse('.label, label-label {font-size: ${fontSize}px;}', "user", true);
		var label:Label = cast mainComp.findComponent("myLabel");
		label.text = "Size: " + fontSize;
		label.validateComponent();
		label.validateNow();
		bmpData = new BitmapData(150, 150, false);
		bmpData.draw(label);
		bmp1.bitmapData = bmpData;
		bmp1.x = 200;
		// This bitmap isn't updated yet
		mainComp.addChild(bmp1);
		
		Timer.delay(()-> {
			bmpData = new BitmapData(150, 150, false);
			bmpData.draw(label);
			bmp2.bitmapData = bmpData;
			bmp2.x = 400;
			// This bitmap is what it should look like
			mainComp.addChild(bmp2);
		}, 100);
	}
}

[intoxopox]

So, really, this applies to any component and its styles. For example, changing component's backgroundColor style requires at least a frame, despite validateComponent and validateNow.