Unable to auto-connect to `QHeaderView.sortIndicatorChanged` by slot name

QtCore.QMetaObject.connectSlotsByName() is unable to connect slots by name to the QHeaderView.sortIndicatorChanged(int, QtCore.Qt.SortOrder) signal, resulting in the following error:

qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_verticalHeader_sortIndicatorChanged(int,PyObject)

The issue does not manifest with other signals in QHeaderView, which may imply the issue is triggered by the use of QtCore.Qt.SortOrder (enum) in the signal.

Reproduction steps:

• Launch the attached Python test app (test_app.py).
• Verify that the "No matching signal" error is produced for on_verticalHeader_sortIndicatorChanged(...), but not for on_verticalHeader_geometriesChanged() or the others.