In Outbreak, Ammo Bearer and Mobile Arsenal have no effect on Secondary Weapons. Furthermore, upon picking up crates, your Secondary Weapon ammo does NOT get refilled. Please see the attached video (link below - note Ammo Bearer and Mobile Arsenal clearly in my inventory).
This was not mentioned in the patch notes, so I'm pretty sure this is a bug and not a nerf to all Secondary Weapons. Prior to this update, Ammo Bearer and Mobile Arsenal would respectively refill/provide more ammo to Secondary Weapons, and picking up crates would also refill Secondary Weapon ammo.
This problem affects every Secondary Weapon, and occurs every single Outbreak game without fail. For simplicity's sake, I recorded this glitch on a custom game, but this happens in regular Outbreak games as well.
UID: 2283478