The bug appears when dragging a window to another screen. The dragged window itself functions fairly well but when the dragged windows geometry is set to another window during that time, it will cause the second window to behave and position itself in an unexpected way.
During the unexpected behavior "setGeometry: Unable to set geometry 24x24+-12+332 on QQuickWindow/''. Resulting geometry: 53x53+-12+332 (frame: 12, 12, 12, 12, custom margin: 0, 0, 0, 0, minimum size: 0x0, maximum size: 16777215x16777215)." is logged into Qt creator.
This bug can be observed only when moving the window to a different dpi screen and high dpi scaling is enabled.
To reproduce the bug run the attached project and simply drag the Main window to another screen.