Initial positioning is broken for BottomToTop ListView wrapped in a ScrollView

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    // Bare ListView (not wrapped in a ScrollView) shows up correctly
    ScrollView {
        anchors.fill: parent
        clip: true

        ListView {
            id: lv

            model: 1000

            // TopToBottom lists get positioned correctly even when in ScrollView
            verticalLayoutDirection: ListView.BottomToTop
            delegate: Text {
                width: lv.width
                text: index
            }

            // The following line may be or may not be there, the effect is the same
//            Component.onCompleted: positionViewAtBeginning()
        }
    }
}