Potions of weakness can be brewed using awkward, thick, or mundane potions

A potion of weakness is commonly brewed by directly adding a fermented spider eye to a water bottle. However, awkward, thick, and mundane potions work as well when brewing potions of weakness, which is not intended in Java Edition. Thick and mundane potions are also likely to be designed to have no brewing usage, so this is probably a bug.