Bug or feature? Panel layout doesn't work when Stage contained in class

Question

I have found a very strange behavior. But can't really understand what goes wrong. So I hope I can get some hints here.
Just try the following demo:
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Panel;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.layout.Container;
public function run(   ) {
  //Remove the next two lines for a miracle!
  Asdf {}}
public class Asdf {
  def stage: Stage = Stage {
      scene: Scene {
        width: 800
        height: 600
        content: [
            def p: Panel = Panel {
                width: bind stage.scene.width
                height: bind stage.scene.height
                onLayout: function (): Void {
                  p.resizeContent();
                  for ( node in Container.getManaged( p.content ) ) {
                    Container.positionNode( node, indexof node * 20 + 50, indexof node * 30 + 40, true );
                content: [
                  Rectangle {
                    width: 140, height: 90
                    fill: Color.ORANGE
                    opacity: 0.5
                  Rectangle {
                    width: 100, height: 120
                    fill: Color.BLUE
                    opacity: 0.5
}The layout function is called, but the values are not respected...
Now just remove the two lines containing the object initialization and class definition. It should look like that:
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Panel;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.layout.Container;
public function run(   ) {
  //Remove the next two lines for a miracle!
//  Asdf {}}
//public class Asdf {
  def stage: Stage = Stage {
      scene: Scene {
        width: 800
        height: 600
        content: [
            def p: Panel = Panel {
                width: bind stage.scene.width
                height: bind stage.scene.height
                onLayout: function (): Void {
                  p.resizeContent();
                  for ( node in Container.getManaged( p.content ) ) {
                    Container.positionNode( node, indexof node * 20 + 50, indexof node * 30 + 40, true );
                content: [
                  Rectangle {
                    width: 140, height: 90
                    fill: Color.ORANGE
                    opacity: 0.5
                  Rectangle {
                    width: 100, height: 120
                    fill: Color.BLUE
                    opacity: 0.5
}Now everything works as expected... Any hints? What did I miss?

Answer 1

I have found a very strange behavior. But can't really understand what goes wrong. So I hope I can get some hints here.
Just try the following demo:
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Panel;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.layout.Container;
public function run(   ) {
  //Remove the next two lines for a miracle!
  Asdf {}}
public class Asdf {
  def stage: Stage = Stage {
      scene: Scene {
        width: 800
        height: 600
        content: [
            def p: Panel = Panel {
                width: bind stage.scene.width
                height: bind stage.scene.height
                onLayout: function (): Void {
                  p.resizeContent();
                  for ( node in Container.getManaged( p.content ) ) {
                    Container.positionNode( node, indexof node * 20 + 50, indexof node * 30 + 40, true );
                content: [
                  Rectangle {
                    width: 140, height: 90
                    fill: Color.ORANGE
                    opacity: 0.5
                  Rectangle {
                    width: 100, height: 120
                    fill: Color.BLUE
                    opacity: 0.5
}The layout function is called, but the values are not respected...
Now just remove the two lines containing the object initialization and class definition. It should look like that:
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Panel;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.layout.Container;
public function run(   ) {
  //Remove the next two lines for a miracle!
//  Asdf {}}
//public class Asdf {
  def stage: Stage = Stage {
      scene: Scene {
        width: 800
        height: 600
        content: [
            def p: Panel = Panel {
                width: bind stage.scene.width
                height: bind stage.scene.height
                onLayout: function (): Void {
                  p.resizeContent();
                  for ( node in Container.getManaged( p.content ) ) {
                    Container.positionNode( node, indexof node * 20 + 50, indexof node * 30 + 40, true );
                content: [
                  Rectangle {
                    width: 140, height: 90
                    fill: Color.ORANGE
                    opacity: 0.5
                  Rectangle {
                    width: 100, height: 120
                    fill: Color.BLUE
                    opacity: 0.5
}Now everything works as expected... Any hints? What did I miss?