Keyboard focus is wrong with QGraphicsProxyWidgets

The keyboard focus is on the wrong widget besides the visual indicator is on the right one. Backspace key also works correctly but all other key events goes to the wrong widget. It's easy to reproduce:

1 - select 1st line edit and type something;
2 - select 2nd line edit and type something,
3 - click the QGV area (no widgets);
4 - repeat the process 1 and 2 and you'll get the bug

This happens easily when using your fingers to select the widgets (as it may hit the qgv area by mistake) and easily reproducible with proxy widgets as QDeclarativeItems in QML (in this case it's even easier to reproduce, even with the stylus).