WebEngineView widget causes menubar, hidden behind title bar, incorrect mouse position reported.

If QWebEngineView instance is created, menubar gets hidden behind the titlebar. Toolbars are incorrectly scaled. Mouse position is reported incorrectly causing web page elements responding to clicks in places several pixels down the appropriate location.

This happens on every single example shipping with Qt 5.10 featuring WebEngine (both widget and quick).

A small example here: https://github.com/nextpagesoft/qtWebEngineDPIBug

Update: upon investigation rendering of the application is fine after setting environmental variable "QT_QUICK_BACKEND=software"

Could be related to the Intel integrated graphics.