Signalling a Slot containing a QFlags argument results in TypeError

For example:
When I connect QImageCapture.captureDestinationChanged signal to a slot captureDestinationChangedSlot and then call QImageCapture.setCaptureDestination(QImageCapture.CaptureToBuffer) it results in a TypeError: Can't call meta function because I have no idea how to handle QCameraImageCapture::CaptureDestinations

Attached please find the minimal_example.py to reproduce the issue and the proposed bugfix.diff which seems to fix the problem.