Default Qt.locale() can't parse a valid number string

import QtQml 2.15

QtObject {
    property double value: Number.fromLocaleString("1,234.01") // 1) Does not work, system locale is en_US
    // property double value: Number.fromLocaleString(Qt.locale(), "1,234.01") // 2) Does not work, system locale is en_US
    // property double value: Number.fromLocaleString(Qt.locale(Qt.locale().name), "1,234.01") // 3) WORKS!

    onValueChanged: console.log("value:", value)

    Component.onCompleted: {
        console.log("Default locale:", Qt.locale().name, ", uiLanguages:", Qt.locale().uiLanguages[0])
    }
}

property double value: Number.fromLocaleString(Qt.locale(Qt.locale().name), "1,234.01")