While I'm not entirely certain that this covers all of the item disappearances I've experienced, I've been able to fully reproduce this contrived circumstance. Steps to reproduce: 1. Build a trap. 2. Have some item in the top-left item slot. 3. Place a trap. 4. Scare a rabbit into the trap. 5. As the trap falls, sadly watch your top-left item disappear. Note: It's generally easiest to perform 3 & 4 simultaneously by placing the trap just above a rabbit hole. I have a saved game state that can make this happen repeatedly. Where can I find it so I can continue playing? Do you want it? If so, How shall I send it? I have a video of the problem occurring. Do you want it? If so, how shall I send it?