I'm doing the "Defeat 3 Fallen Walkers" one. I have defeated 5 and it still says "2 of 3 Completed." 4 of the walkers were in cosmodrome as public events and 1 was the walker in the last area before Sepiks Prime. Platform: PS4 UPDATE: 6 walkers; no bounty UPDATE 2: 9 walkers now. After quitting/restarting the bounty I went and did Patrol Cosmodrome. Went straight to where the Walker is before Sepiks Prime; killed it solo; orbit; repeat. I'm pretty sure this isn't the way it's suppose to work so I still think there's a bug. Particularly since 3 of my previous 6 DW kills were this same walker location. Fix please.