Animation freezes midway when triggered from the notification area (system tray) icon

Code that animates window sliding into the screen when clicking notification area icon no longer works correctly.

See minimal repro (QtCreator project) attached

1. Click the tray icon
2. Tray icon triggers QQuickView to open and animate moving on the Y axis to its final position
3. Animation will freeze before reaching the final position
4. Animation continues if I unblock the postedEvents queue by hovering the mouse over the window

Upon initial debugging, looked like all after a while all the timer events get compressed without anyone calling sendPostedEvents.