Qt::OpenHandCursor displays the same as Qt::ClosedHandCursor (5.9 regression)

There appears to be no difference between the open and closed hand cursor. The attached (CursorTest.zip) demonstrates this as follows:

With the mouse cursor over the main window:

1. Pressing and releasing the left mouse button should cycle between the open and closed hand cursor. However, it appears that the closed hand cursor is always shown.
2. Pressing and releasing the right mouse button cycles between the cross cursor and the arrow cursor. This works correctly.