Class Challenges not tracking

Greetings, 

As stated by other people. Most, if not all, of the class challenges aren't registering correctly. For example, Engineer Specialist 2. I've assisted and destroyed multiple aircraft but I'm still at 1/50. 

Scoring hits on aircraft is already hard enough without it not being counted for the challenge. This is just an example. I would be hard pressed to find a class challenge that hasn't been bugged.  Sort it out or give us back the ability to earn these in Portal. 

Regards.