(sorry for my english)
The contents of the hotplate are supposed to disappear after restarting the server. I found a hotplate and attached a gas cylinder and a saucepan to it. It was in my inventory. The next day, when I entered the game, only the burner remained in my inventory. The next time I managed to find only a frying pan and attach it to the burner. After restarting the server, the frying pan disappeared and only the hotplate remained. I cannot provide more information - pots, pans and gas cylinders are quite rare.