A node created with opacity is 0.5 is opaque. This happens only on emulator and works correctly on desktop. Compatibility issue

To reproduce, run the below code on emulator. If the red rectangle is opaque, bug is reproduced

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

Stage {
    width: 300
    height: 300
    scene: Scene {
        content: [Rectangle {
            x: 40
            y: 40
            width: 80
            height: 60
            fill: Color.BLUE
        }, Rectangle {
            x: 80
            y: 80
            width: 80
            height: 60
            fill: Color.RED
            opacity: 0.5
        }]
    }
}