Gun brandish spam duplicating ammo

I noticed the other day but thought someone might have reloaded my gun for me as I got somebody to look after it for me. I have noticed that if you spam click to pull your pistol out over and over again it replenishes the amount of ammo that you have. I only confirmed it today and came straight here to notify you of this bug.

1. Press keybind to get gun out
2. Keep pressing the keybind over and over continuously to pull your gun out and put it away
3. Reload animation happens and total ammo goes to max.

Expected Behavior: Pull gun out and same amount of ammo you had in your gun previously is seen in ammo stockpile

Actual Behavior: Pull gun out and you have MUCH more ammo than you originally had up to maximum carry amount.