I was trying to brew potions of withering using JEI, but the coal recipes weren't working. I checked the config file and noticed that coal was listed twice for the ingredients list.

I found a way to fix it and thought I should probably post it here for others and you to find:
change the entries of coal into "minecraft:coal=blindness|1|0;absorption|3|0;invisibility|1|0;wither|0|0"
this should now fix the bug of the invisibility essence and wither essence being uncraftable with the right recipe.

Shouldn't it be different by default?

fixing the default for 1.19