I'm showing a HBox containing a few nodes. The HBox is made hidden and some value is set for 'rotate' attribute. When the HBox is made visible, the result shows as if HBox was rotated around its origin instead of center. When a visible HBox is rotated, it rotates around its center.

To reproduce, run the below code. Deselect the 'visible' checkbox and move the 'Rotate' slider. Select the 'visible' checkbox. It could be seen that the HBox shows rotated around its origin.

import javafx.ext.swing.*;
import javafx.scene.*;
import javafx.stage.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;
import javafx.scene.layout.*;

var visible: Boolean = true;
var rotate: Integer = 0;

Stage {
    width: 500
    height: 400
    scene: Scene {
        content: [HBox {
            content: [for (i in [0..10]) Rectangle {
                width: 20
                height: 20
                fill: Color.RED
                stroke: Color.GREEN
                strokeWidth: 3
            }]
            rotate: bind rotate
            visible: bind visible
        }, HBox {
            content: [SwingCheckBox {
                text: "Visible"
                selected: bind visible with inverse
                width: 80
            }, SwingLabel {
                text: "Rotation"
            }, SwingSlider {
                minimum: 0
                maximum: 360
                value: bind rotate with inverse
                width: 150
            }]
            translateX: 50
            translateY: 300
        }]
    }
}