QML property override does not work if there is a sub components

Consider of having following QML sub component:

SafePicture {
    id: iconLowBeam
    x: 100
    y: 100
    width: 64
    height: 64
}

When using the component in the main qml as follow:

IconLowBeam {
    x: 100
    y: 100
} 

Then icon goes to 200, 200 even the right position is 100, 100.