Situation: Your inventory is full, you find a mag full of ammo that you need but you dont have the space to take the whole mag with you. You empty it without putting it first in your inventory and the only thing left is an empty mag and the ammo totally disappear

Solution ATM: You have to make space in your inventory to be able to fit the mag in + 1 extra slot for the bullets when you empty it, drop the empty mag on the ground and take back your items you initially dropped