QObject-based Python objects deleted when QApplication is explicitly deleted via Shiboken.detele()

import sys

from PySide6 import QtCore, QtWidgets
from shiboken6 import Shiboken


class MyObject(QtCore.QObject):
    pass


my_object = MyObject()

app = QtWidgets.QApplication(sys.argv)
QtCore.QTimer.singleShot(500, app.quit)
app.exec()

print('Shiboken.isValid:', Shiboken.isValid(my_object))
Shiboken.delete(app)
print('Shiboken.isValid:', Shiboken.isValid(my_object))

>>> Shiboken.isValid: True
>>> Shiboken.isValid: False    <--- Unexpected

RuntimeError: Internal C++ object (MyObject) already deleted.