Nested layout with 0 implicitHeight not handled correctly

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12
import QtQuick.Layouts 1.12

Window {
    width: 300
    height: 400
    visible: true

    ColumnLayout {
        anchors.left: parent.left
        anchors.right: parent.right

        Label {
            Layout.fillWidth: true
            text: "Text 1"
        }

        ColumnLayout {
            Layout.fillWidth: true

            Label {
                Layout.fillWidth: true
                text: "Sub Text"
                visible: showSwitch.checked
            }
        }

        Label {
            Layout.fillWidth: true
            text: "Text 2"
        }
    }

    Switch {
        id: showSwitch
        anchors.centerIn: parent
        text: "Show Sub Text"
        checked: true
    }
}