Yet another weekly challenge is wrong

The text is clearly wrong or misleading: -

"Get kills. Avenger kills count double." All modes. The requirement is 10.

I have got 7/10 after dozens of matches today.

It clearly is not just "get kills" I have hundreds since unlocking this challenge.

It clearly is not a hidden "in a match" because I have had matches with many more than 10.

It is maybe not that Avengers "count double" but _only_ Avengers count?

It is maybe just not all modes. It is maybe just not working well.

Either way it is yet ANOTHER challenge that DICE have messed up.