custom window shifting when using Open GL on lower than Intel HD 5000

Hello, for a project, I need to use a module using OpenGL under Qt but, with Windows 10 running on some Intel HD chipset (below Intel HD 5000), I observe a shift in the rendered area that does not impact the event area.

This problem can be fixed by using the Qt::AA_UseSoftwareOpenGL flag but the latter removes any hardware acceleration, significantly slowing down the application.

This bug has already been reported in this report: QTBUG-40578 but the correction seems partial.

The minimal code repo is here: https://github.com/SieloBrowser/QtTitleBarBugz