[CLIENT] Lost key and case after crash during case opening

While I was opening a case in the Loot and crafting Inventory, the game crashed during the opening itself. I tried restarting the client several times but it always crashed when I tried to enter the Loot and Crafting Inventory. I had to restart my computer before I could enter the Loot and Crafting Inventory. When I finally entered the Inventory I realised the key and case I used for the opening were gone and no new items had appeared.