Ammo Disappearing From Clip on the Poppy Mountains

Basically if you got to the mountains and you pluck a few poppys, sometimes a Cougar will appear near the area, and they will kill you instantly, its really annoying that i know 100% that i’m fully loaded with ammo and all of a sudden my clip is empty, Leaving me vulnerable to the Cougar and being its next meal. This happened a few times to me before with Barretas, FNX, M1911.