- 
    Bug 
- 
    Resolution: Done
- 
    P3: Somewhat important 
- 
    5.9.5
- 
    macOS 10.11
Steps to reproduce:
- run the sample attached
- hover the mouse cursor over the first widget -> tooltip appears
- quickly move the mouse cursor on the other widget, and let it hover -> tooltip appears
 EXPECTED: Both tooltips have a shadow effect.
 ACTUAL: The newly opened tooltip does not have the shadow effect it should have (see 'qtbug_tooltip_shadow.png' attached).
