Stage set with visible: false appears on the screen. Visible property is ignored.

import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;
import javafx.scene.input.*;

Stage {
    width: 400
    height: 400
    visible: false
    scene: Scene {
        content: Rectangle {
            x: 40
            y: 40
            width: 50
            height: 50
            stroke: Color.BLACK
            strokeWidth: 4
            fill: Color.BLUE
        }
    }
}

Reproduced it on WinVista - Soma-b28 - Nvidia GeForce 8400M.