When taking stuff from furnaces, it should be the product inventory!
Possible fixes:
Make the bot aware of the different inventories, so the right one can be selected
hard-code the inventory based on the entity type / item type (e.g.: wood from chest -> chest inventory. wood from furnace: fuel inventory. iron-plate from furnace: ???)
Ignore the problem and make the decision in the lua mod.
When taking stuff from furnaces, it should be the product inventory!
Possible fixes:
Best would be 1.