In co-op as host on our way through the hallway mission to get to the third zone. At the second to last lantern on the truck, we encountered no enemies since the previous lantern, but as soon as Lauri appeared to speak on the truck we got ganked by two stormtrooper mimics that instantly killed me. Upon respawn my friend noted he couldnt see my backpack. After walking all the way back we searched for several minute and could not locate it. Fully kitted out backpack with all my gear and ammo just vanished, presumably fell through the floor. This was on Ironman mode as well so reloading the save did not help.
#Lost Backpack
deep skiff
feral gust
When you die in the hallway areas your backpack spawns in front of you by the first lamp