QAxWidgets does not get the the focus correctly

I attached a test program that is showing the following problem:
1.) Start the program and click into the ActiveX. You can scroll with the mouse wheel.
2.) Then if you click once into the QLineEdit I placed above and again click into the ActiveX you can't scroll anymore.
3.) If you double click on the ActiveX you can scroll again.
4.) Do step 2.) and you can't scroll

When you click in the ActiveX control the line edit is still blinking so it still thinks that it has the focus. Debugging the QAxWidget you can see that it does not get the foucusInEvent/focusOutEvent correctly.