So I got the game here for the DLC packs to finally play the survivor mode challenges. But there is one huge issue, after some period of time, perhaps 15 or 20 minutes, my weapons disappear and I can't use them anymore. They are still in my inventory but they can't be selected or used.
This mainly affects the "play all" option as you do not spend enough time in the single missions to trigger it, but will tend to run into it when the missions are played as a set.

Is there anything I can do about this? It kinda makes it basically unplayable as you just suddenly lose everything you've collected and crafted and can't cause distractions or scare the alien away anymore.