LinearGradient not working inside a VBox or HBox

When there is multiple Rectangales (or shapes) in side in VBox or HBox LinearGradient is not filling for all the rectangles.
Workaround :
Using Group instead of VBox / HBox

Here is the code -

import javafx.stage.Stage;
import javafx.scene.text.Text;
import javafx.scene.text.Font;
import javafx.scene.paint.Color;
import javafx.scene.paint.LinearGradient;
import javafx.scene.paint.Stop;
import javafx.scene.shape.Rectangle;
import javafx.scene.layout.VBox;
import javafx.scene.Scene;

Stage {
   title: "Application title"
   width: 250
   height: 240
   scene: Scene {
       content: [
           VBox { spacing: 10
           content: [
           Text {
               font : Font {
                   size : 16
               }
               x: 10
               y: 30
               content: "Application content"
           },
           Rectangle {
               width: 50
               height: 40
               fill: LinearGradient {
                   startX: 0.0 startY: 0.0 endX: 1.0 endY: 1.0
                   proportional: true
                   stops: [
                       Stop { offset: 0.0 color: Color.GREEN },
                       Stop { offset: 1.0 color: Color.YELLOW },
                       ]
                   }
               },
           Rectangle {
               width: 55
               height: 45
               fill: LinearGradient {
                   startX: 0.0 startY: 0.0 endX: 1.0 endY: 1.0
                   proportional: true
                   stops: [
                       Stop { offset: 0.0 color: Color.YELLOW },
                       Stop { offset: 1.0 color: Color.BLACK },
                       ]
                   }
               },
           Rectangle {
               width: 60
               height: 50
               fill: LinearGradient {
                   startX: 0.0 startY: 0.0 endX: 1.0 endY: 1.0
                   proportional: true
                   stops: [
                       Stop { offset: 0.0 color: Color.YELLOW },
                       Stop { offset: 1.0 color: Color.RED },
                       ]
                   }
               },
               ]
               }
               ]
               }
}