Just another poorly designed activity/quest system from Bungie. They give you the hammer, but don't explain what you need to do to use it, then they make the node difficult to find/identify once you get into the activity, made worse by the fact normally you are rushing to find it before your two blueberries drag you into the "Joining Teammates" countdown before you can get any samples. They took it a step further by making it a quest requirement for this week's questline to have to find a certain sample between fights in the activity. It was hilarious watching Datto stream it last night and he had to replay it again because his teammates ran forward and triggered joining teammates before he could even start to look for the item he needed to finish the quest. Just terrible/lazy design overall.