I’m experiencing this issue on 4.25.3 and have seen numerous posts about this known bug. I have a 3D widget component added to a blueprint that displays a widget UI with a combo box.
If the widget is set to screen the combo box on click shows the list strings options and works as expected.
If I set the widget to world, the combo box still displays but nothing drops down on click.
fyi this is happening previewing in the editor