I'm playing FTB ultimate reloaded. I'm having an issue where build craft pipes, if you connect multiple furnaces together with them (the tops/input), it will turn the furnace into something weird. Once you put fuel and and a cooking item in, it kicks you out of the UI then deletes both items. The furnace shows burning but there are no items in it and when it finishes nothing is pulled out by the pipes. This also happens after the missing items finish cooking then you put something in it next time, those items disappear again. So it eats a lot of my smelting stuff.