After creating an automated smelter using 4 x blast furnaces, I noticed I would no longer receive any experience when pulling the ingots from the chest at the bottom. If I remove the final hoppers and collect the ingots directly from the blast furnaces, I get the experience as expected.
Also tried this with regular furnaces w/ same issue. Seed was generated on 1.17 release.
Comments 2
The experience awarded from smelting items is stored in the furnace itself and isn't awarded when collecting smelted items from a chest. As stated above, if you take a smelted item from the furnace or break the furnace altogether, you are granted with the appropriate amount of experience. See MC-127692 as this may help you understand this mechanic.
When the hoppers pull items out the furnace, the experience they would give is stored in the furnace. When you pick a melted item out the furnace or break it, you get all the experience stored in the furnace.