Qt6/QtWebEngine does not show state changes to CSS radio-buttons and checkboxes when the state is changed with mouse-clicks.

For radio buttons state changes actually happen e.g. changing True->False and False->True, but the state change is not shown/rendered on the screen.

Similarly, state change of CSS checkboxes from checked->unchecked and unchecked->checked actually happen with mouse clicks, but the change is not made visible/rendered on the QtWebEngineView.

These CSS widgets show/render state changes without any problem on Qt5/QtWebKit.
And the state changes show on Chrome.
So, this is a Qt6/QtWebEngine bug.