Normal vanilla underground belts don't work across open space (no space platform placed, not just empty buildable space; space that is not buildable in space), but the ultimate belts, all of them as far as I can tell, do. I don't think this is intended, so I'm reporting it as a bug. It's not game breaking or causing too many balance issues (the belts do that enough themselves), but I do think this should be fixed so that these new belts behave like the vanilla belts. Thanks!
