Spell Affinity Bonus Doesn't Apply to Acid Spittle

[SignedName]

The Wiki states that Acid Spittle deals more damage as Acid Spell Affinity increases. The attack also costs 1 MP when it should be free (again according to the Wiki).

[Fellis]

confirmed that costs 1 MP, also that the mainscreen dropdown isn't showing the damage increase from affinity bonus on dev. However the skill is dealing increased damage as stated.

not sure if the 1 MP is an oversight or undocumented change, but acid spittle is extremely fairly costed without MP costs, considering you could spend very similar CP and get a 12 damage autohit for 3mp or 1mp with some prep