When using QGraphicsView::setCursor() after a QGraphicsItem child has had QGraphicsItem::setCurosr() called, all QGraphicsView::setCursor events will be ignored.

Please see example attached:

If the mouse has never been moved inside the area occupied by the
QGraphicsRectItem after the application start everything works as
expected.

Middle click (and hold button) anywhere inside the QGraphicsView
after moving the mouse pointer inside and then outside the area
of the single QGraphicsRectItem in the attached sample app.

Expected to see:
Change of cursor shape.

Got instead:
No change of cursor shape.