LAN disconnect with items on a crafting table eradicates those items

I am logged onto another windows 10 game via LAN. When I craft items on a crafting table, sometimes I will get disconnected from the server (i.e. the origin computer running the game world). When I log back on, whatever items were on the crafting table are completely gone....annihilated. Not in my inventory, and not on the ground. This happened while I was crafting an enchanting table in my survival world, it was painful to lose the diamonds.