Assimilation: Guinea Pigs Bug

tuesdaygirl

Can't get past the room where you are supposed to destroy the nodes Destroy Borg Devices (0/3). I have apparently destroyed nodes 2 and 3, but there is no node 1 where the mission's green circle is located. I have aborted the mission many times, and the same thing happens. I have completely dropped the mission and restarted it twice before it finally worked.