Scene don't receive focus, when interacting with popup content.

Run the app.

You have a stage, and a comboBox IN a popup.
Move stage away.
We have a popup.
Click somewhere on the desktop, to make stage unfocused.
Click on dropdown of the comboBox, and select some item.
ComboBox stays unfocused. But it was interacted.
Try to type something on the keyboard. Nothing comes. Because stage is not focused.