"Error: Locale: Number.fromLocaleString(): Invalid format" when erasing last digit of "2,000" in editable SpinBox

import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3

ApplicationWindow {
    visible: true
    width: 500
    height: 120

    SpinBox {
        id: widthSpinBox
        value: 2000
        to: 2000
        editable: true

        Connections {
            target: widthSpinBox.contentItem
            onTextEdited: {
                print("widthSpinBox.contentItem.text =", widthSpinBox.contentItem.text)
                var currentValue = widthSpinBox.valueFromText(widthSpinBox.contentItem.text, widthSpinBox.locale)
            }
        }
    }
}