When we use QSGRenderNode with DepthAwareRendering,
Item's visual ordering does not work as expected.

You can simply reproduce this issue by running attached application.
It's 100% reproducible.

import QtQuick 2.12
import QtQuick.Window 2.12
import MyItem 1.0

Window {
    id: root
    width: 1920
    height: 720
    visible: true

    MyItem {
        id: myItem
    }

    Text {
        font.pixelSize: 20
        color: "black"
        text: "Hello Text"
    }

    Rectangle {
        anchors.fill: parent
        color: "green"
    }
}

Above code is main.qml from the attached application.

Expected result is we never see the text "Hello Text",
but actual result is the text is on the green rectangle.