PC (Steam) - "Complete the Evolution" Achievement Bug

HHIO

While most times a bugged Achievement means it is unobtainable, its the polar opposite in this Case.

I was rewarded with this Achievement because i seemingly fullfilled the requirements (Injure or Down 3 Survivors who are hindered with the Singularity in public matches), but i played Mastermind the entire Time. I dont even own The Singularity