There seems to be a defect in the automatic loading function of Resourceful Furnace.
If the carry-in and carry-out match in the GUI for specifying the carry-in slot, the material will be carried out as it is.

Oh, I found another problem when I was investigating the problem of delivery
It seems that firing will stop if you return to the title and reconnect while using Resourceful Furnace.
If you take out the items inside and bring them back in, it will work properly.