Settings widget size to QApplication::desktop()->geometry() with AA_EnableHighDpiScaling and screen scaling doesn't cover whole desktop

I have an application that needs to show a Widget across all screens. I have used following logic to achieve this: 

setGeometry(QApplication::desktop()->geometry());
QWidget::show();

lal
Now whit AA_EnableHighDpiScaling enabled and at least one screen having screen scaling enabled, that doesn't work anymore. It results in this (left screen 1920x1080 scaling 100%, right screen 2560x1440 scaling 150%):

The geometry returned from QApplication::desktop()->geometry() seem to be with applied scaling where the setGeometry method expects without applied scaling, resulting in the widget only covering part of the desktop instead of all.

Geometry reported QRect(-1920,0 3200x1080)

Here is a simple example application https://github.com/DamirPorobic/WindowsFullScreenWithScalingIssue

Edit: Disabling AA_EnableHighDpiScaling fixes this issue but I need that config to fix other issues.