Exterminate Fissure Mission Issue

[1Ruinmaster1]

I join an exterminate fissure mission and see that there are only like ten enemies left to get rid of before the mission is complete. While my team has all 10 reactant I sit there with 0. Because the mission is complete no more enemies spawn, which means no more reactant for me and no chance to open my relic. Now this has happened countless times to me and some of the people in my squad. Can it be made so enemies spawn until the last person has 10 reactant. (I have tried scouring the map for some lying around but to no success)