3D Scene covers a quarter of available space on macOS Retina display

The 3D scene is developed with Qt3D by Qt 5.11.3 and Xcode 9.4.1 build tools. On macOS Retina display (10.14 Mojave), the attached screenshot is observed.

It means 3D entities appear only on a quarter of available space (lower left). There are two workaround for this:

1. Set Retina display to full native resolution (microscopically small) then open app which seems to look and function correctly. Then lower the resolution to something usable and app continues to work properly
2. Get info of the app and check the open in low resolution checkbox