Pedersen tool in `circomlibjs` doesn't match the pedersen in `circom` about circomlib HOT 4 CLOSED

function buffer2bits(buff) {
    const res = [];
    for (let i = 0; i < buff.length; i++) {
        for (let j = 0; j < 8; j++) {
            if ((buff[i] >> j) & 1) {
                res.push('1');
            } else {
                res.push('0');
            }
        }
    }
    return res;
}

pragma circom 2.0.0;

include "../node_modules/circomlib/circuits/pedersen.circom";

component main = Pedersen(248);

pedersen = await buildPedersenHash();
const b = Buffer.alloc(31);
for (let i = 0; i < 31; i++) {
   b[i] = i + 1;
}
const pedersenHash = pedersen.hash(b)
const points = pedersen.babyJub.unpackPoint(pedersenHash)
console.log(points);

function buffer2bitArray(b) {
    const res = [];
    for (let i = 0; i < b.length; i++) {
        for (let j = 0; j < 8; j++) {
            res.push((b[i] >> (7 - j) & 1));
        }
    }
    return res;
}

const { proof, publicSignals } = await groth16.fullProve({ in: arrIn }, "./build/pedersen_test_js/pedersen_test.wasm", "./build/pedersen_test.zkey")
console.log(publicSignals)