Confusion about Brand type usage in Effect Typescript library

import { Brand } from "effect"

const sym = Symbol("A")

type A = Brand.Branded<string, typeof sym>
const A = Brand.nominal<A>()

console.log(A.is("foo")) // I expect false but it is true because it doesn't use A's constructor

console.log(A.is(A("bar"))) // I expect true here, it is true