REG: Selecting text inside a TextEdit causes existing lines to disappear and empty lines to appear.

import QtQuick
import QtQuick.Controls

ApplicationWindow {
    id: root
    width: 640
    height: 480
    visible: true
    color: "#333"

    property int sampleCounter
    property string sampleText

    readonly property Timer updateTimer: Timer {
        interval: 100;
        running: true
        repeat: true
        onTriggered: {
            sampleText += "New Text line " + sampleCounter++ + "\n"
        }
    }

    Column {
        anchors.fill: parent
        Button {
            text: updateTimer.running ? "Pause Updates" : "Start Updates"
            onClicked: updateTimer.running = !updateTimer.running
        }

        TextEdit {
            width: parent.width
            text: sampleText
            selectByMouse: true
            selectByKeyboard: true
        }
    }
}