QWindow::touchEvent not called (on Mac)

The QWindow::touchEvent () protected function is not called when the track pad is touched. Nor are QTouchEvent's seen in in the event function.

These events ARE seen in a QWidget equivalent.

According to the 5.6 documentation:

"Unlike widgets, QWindows receive touch events always, there is no need to opt in. When working directly with a QWindow, it is enough to reimplement QWindow::touchEvent()."

The attached simple test app uses QRasterWindow, but the same problem exists using QWindow.