When a cauldron (containing one-third of the potion) is placed under the dripping stone pillar and water is placed on the dripping stone pillar, the potion in the cauldron will be filled

When a cauldron (containing one-third of the potion) is placed under the dripping stone pillar and water is placed on the dripping stone pillar, the potion in the cauldron will be filled

I don’t know if this is set deliberately, I don’t think it is reasonable