Using a tablet (wacom intuos pro) fails to provoke enter/leave events when a widget border is crossed

Using a tablet (wacom intuos pro) fails to provoke enter/leave events when a widget border is crossed

Steps to reproduce:

• Run the sample attached.
• Use a tablet, Wacom or equivalent, to control the mouse cursor.
• Hover the pen above the tablet so that the cursor moves on the app.
• Move the cursor over the green border between the TestWidget and the QLabel.
  EXPECTED: Crossing the border causes enter and leave events.
  ACTUAL: No enter/leave events.

Might be related to QTBUG-65200