focusable item becomes impossible to focus after reparenting to a newly loaded item

Step to reproduce:

1. Run pure-qml as Wayland compositor
2. Run any IVI Wayland client (iviId=100) with a textField
3. Click on textField and enter something using Qt Virtual Keyboard
4. Click on "Hide/show" button twice with an interval
5. Click on textField and enter something using Qt Virtual Keyboard

Results:
3. The text is entered into the inputField
5. No text is entered in the inputField. (But the predictions work fine.)

Used QVK with Cerence libraries and patches for them.