1. Open a qml file.
2. Switch to Design mode.
3. Add a state by clicking on the dark plus sign above the preview.
4. Double-click the new state's name.
5. Change the name by typing some characters. Don't press enter so the edit still has focus.
6. Move the mouse pointer to the plus sign for adding another state or to the preview.
   The edit will lose focus and the name change will be lost.

The edit should keep the focus until the user explicitly moves it to somewhere else.