Image in QQuick3D mesh not preserving aspect ratio

[Developer Harrison]

I am trying to load an image in a mesh (#Cube) but the image is not preserving aspect ratio. I need assistance

Below is my code

Node {

            //eulerRotation: Qt.vector3d(20, -40 + cubeRotation, -10 + cubeRotation)
            eulerRotation: Qt.vector3d(10, -5, -10 + cubeRotation)

            Model {

                id: qtCube
                source: "#Cube"
                scale: Qt.vector3d(3.5, 3.5, 3.5)
                opacity: 0

                materials: DefaultMaterial {
                    diffuseMap: Texture { source: "file:///home/pi/mybiz/favourites/" +cubeBurstSource }
                    //diffuseMap: Texture { source: "image://images/result" }
                }
            }