I can’t put my finger on it but I’m guessing it has something to do with an augment modification (was there any?)
Since the update certain players are just eating ammo packs non stop.
Usually you can give someone an ammo pack, and if you throw another one at them it just goes through them as their ammo is now full, but lately there are certain players you can throw 5 ammo packs at even if their ammo is full, and they pick them all up in one hit. You get all the XP for it too.