Adrenaline Injector challenge not tracking

I'm also having the same issue, I'm trying to unlock the spawn beacon and my "kills while using the adrenaline shot" is stuck at 0/30 even though I've shot someone immediately after using it. Kinda sucks because spawn beacons are awesome :( hopefully this is resolved quickly

Hey, I agree I had the same issue, but I just got 1/5:
I don't know if they just fixed it, but I did a kill with a shotgun after using it.
Give it a try! 

(moreover this bug report seems to be related, and they seem to say it's just the time after using it that is short: https://forums.ea.com/idea/battlefield-6-bug-reports-en/assault-challenge-1/12742741)

This is just not a fun challenge EA. Did you even try it? 

Of course the terrible challenge also doesn't work

I figured it'd be for as long as the effect is active, but nah, they gotta make things 1000x harder

I finished the challenge yesterday 30/30 — you literally have to kill the enemy instantly after using the injector. 

Like within a second; two seconds already seem too long. 

If you do it right, you’ll see the “Berserk” text appear near your crosshair.

Same thing, players cannot unlock Assualt Class Challenge 1 for the Redeploy Beacon because our Kill during Autoinjector Use aren't counting, can provide stream footage if needed. I only have 3 kills when I've easily done over 50.  This is bull**bleep**, please fix Assignments so they work correctly!

It's definitely not working properly. I've got it to 4/5. There seems to be no logic behind when it registers or not. I've gotten dozens of kills and sometimes multikills right after injecting it, and still it doesn't count. Such an awful challenge 🤬

There must be something that's not working 100%

I had one single match where it worked well, 15 in one close combat game. After that, nothing, one or two per match. Even though I had the same situations with adrenaline followed by a kill right after.

Indeed, you need to see the Berserk info next to the crosshair to indicate it's active. But it's this effect that doesn't seem consistent.

Beyond the challenge itself, it's more the small point interaction that's not working properly