For some reason, I cannot start any complete for the challenge? I want to unlock the calling card and 15 SMG kills? I wonder if this is a bug? I was playing Team Deathmatch on multi-player using the filter section multi-match. The other character challenges work and I earned something but Mara never seems to work? Is this something that needs looked at and addressed or can we link this ramification to the devs and see what they can do to fix this issue? Does anyone meet this issue? What I am doing wrong here? I am pretty sure it should be working. Been trying to unlock each character challenge.