Recipe isnt working (I think this works it dose for some people but not all)

A recipe sometimes doesn't work when you have the mod on Ik a few ways to fix and some I didn't figure out

This is happening with armour,blocks,when you download it isnt there: Idk how to fix this but this is sometimes the reason it doesn't work

Recipe isnt in Minecraft: Maybe you did something or selected a option that broke it (if you didn't remake the recipe if that doesn't work then oof) (%60 works sometimes)

Recipe dupe glitch: If you are using a furnace if you put a ore into it then pull it out and click shift it dupes the ingot or whatever it is gonna become after it is burned there is a way to fix it use procedure and make it so when you click shift in a furnace nothing happens (must be a custom furnace) (%100 works)