QObject::disconnectNotify() is not called

QMetaObject::Connection conn = QObject::connect(myObject, &MyObject;::someSignal, this, [this]()
{
});

QObject::disconnect(conn);
// Or disconnect(myObject, SIGNAL(someSignal()), 0, 0);

void MyObject::disconnectNotify(const QMetaMethod&)
{
// function not called
}