QML segfaults when using enums from a singleton object

import sys
import pathlib
import enum
from PySide6 import QtCore, QtGui, QtQml, QtQuick
class TestObject(QtCore.QObject):
    @QtCore.QEnum
    class MyEnum(enum.Enum):
        First, Second, Third = 1, 2, 3
    @QtCore.Slot(MyEnum)
    def clicketyClick(self, testParameter: MyEnum) -> None:
        print(f"Button Clicked! {testParameter}")
if __name__ == "__main__":
    app = QtGui .QGuiApplication(sys.argv)
    view = QtQuick .QQuickView()
    testObject = TestObject()
    QtQml.qmlRegisterSingletonInstance(TestObject, "TestModule", 1, 0, "TestObject", testObject) # type: ignore
    view.setResizeMode(QtQuick .QQuickView.SizeRootObjectToView)
    qml_file = pathlib.Path(__file__).parent / "test.qml"
    view.setSource(QtCore.QUrl.fromLocalFile(qml_file.resolve()))
    view.show()
    app.exec()

import QtQuick
import QtQuick.Controls
import TestModule
Item{
    width: 500
    height: 500
    Button{
        text:"Click Me"
        onClicked: {
            TestObject.clicketyClick(TestObject.First)
        }
    }
}