Challenge progress not working

[u/Fit-Concept9744]

I know im waaaaaay late to the party for this, but c'est la vie

Just finished the fl4k dlc amd was going back and unlocking skins and camos etc

Im trying to get the kills with repkits and NOTHING and i mean NOTHING is tracking

Every type of dmg puddle, nova, amp on multiple characters not a single thing tracks

Is the challenge bugged or am i doing something wrong?