“That odd man Buttons may be made fun of for his weird, hobby and obsession. But one of his magic buttons could save your life one day”.
An alchemist enchanted his equipment to produce even more powerful alchemical compounds, potions and the like. Unfortunately, it is not well-known that he had different sets of equipment for different processes: If the wrong set of gear is used, the result will invariably fail to function. It's not a cursed item, just something that's hard to figure out.