Changing the image source does not change the QQ3D texture.

import QtQuick 2.15
import QtQuick3D 1.15

Item {
    id: root
    objectName: "DisplayArea3D.qml"
    implicitWidth: 1000
    implicitHeight: 760
    clip: true
    property alias source: image.source
    Node{
        id: mainScene
        DirectionalLight{
            ambientColor: "#cccccc"
            eulerRotation.x: 0
            eulerRotation.y: 0
            eulerRotation.z: 0
            brightness: 100
        }
        Model {
            source: "#Rectangle"
            materials: DefaultMaterial {
                diffuseMap: Texture {
                    id: texture
                    sourceItem: Image {
                        id: image
                    }
                }
            }
        }
        PerspectiveCamera {
            id: sceneCamera
            fieldOfView: 45
            x: 0
            y: -500
            z: 500
            eulerRotation.x: 45
        }
    }
    Rectangle{
        id: container
        anchors.fill: parent
        border.color: "black"
        gradient: Gradient{
            GradientStop{position: 0.0; color: "#000000"}
            GradientStop{position: 1.0; color: "#7F7FFF"}
        }
        View3D{
            id: mainView
            anchors.fill: parent
            importScene: mainScene
            camera: sceneCamera
            renderMode: View3D.Offscreen
        }
        Text {
            text: root.source
            color: "white"
            font.pixelSize: 24
        }
    }
}