Mastery

Ive been trying to do mastery the whole beta (yes ik theres a wipe) however destroyer seems to have it the hardest, i have 2 clips of killing people in smoke for the challenge "Destroy a runner hiding in smoke whule search and destroy is active" i have killed like 3 then another game 1 in smoke and it didnt count, maybe its a bug but nobody even smokes anymore? Can this be changed to something similar and just not smokes? I tried the other masterys and dont the near hard ones like triage hit an enemy and teamate with the ult ability and its def easier since they are usually close to each other.