Crash when accessing QScxmlEvent

<?xml version="1.0" encoding="UTF-8"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" binding="early" xmlns:qt="http://www.qt.io/2015/02/scxml-ext" name="demo.scxml" qt:editorversion="10.0.1">
    <state id="init">
        <transition type="internal" target="main"/>
    </state>
    <state id="main">
        <onentry>
            <send event="main_entered"/>
        </onentry>
    </state>
</scxml>

from typing import cast

from PySide6.QtCore import SLOT, QObject, Slot
from PySide6.QtScxml import QScxmlEvent, QScxmlStateMachine
from PySide6.QtWidgets import QApplication

class StateMachineTest(QObject):
    def __init__(self, parent: QObject | None = None) -> None:
        super().__init__(parent)
        self.sm = QScxmlStateMachine.fromFile("test.scxml")
        self.sm.connectToEvent(
            "main_entered",
            self,
            cast(bytes, SLOT(cast(bytes, "handle_event(QScxmlEvent)"))),
            # double cast because type hints for both SLOT() and 
            # QScxmlStateMachine.connectToEvent() are wrong.
        )

    # Slot type argument must be a string, or connect() will not find it
    @Slot("QScxmlEvent")
    def handle_event(self, event: QScxmlEvent) -> None:
        print(f"{event = }\n")
        print(f"{dir(event) = }\n")
        print(f"{event.name = }\n")  # OK up to here
        print(f"{event.name() = }\n")  # crashes here

if __name__ == "__main__":
    app = QApplication()
    sm_test = StateMachineTest()
    sm_test.sm.start()
    app.exec()