The mouse cursor doesn't update properly when using QQuickWidget

The attached sample program embeds a QQuickWidget into a QWidget.
And there is a red rectangle containing a MouseArea whose cursorShape property is [Qt.PointingHandCursor].
1、move mouse from outside the window into the MouseArea, up to down, you will find
that the mouse cursor changed from ArrawCursor to PointingHandCursor，but
2、if you resize the window, and then repeat the (1), you will find that the mouse cursor
doesn't change.