principal_id_to_address Breaking - pid.toBlob is not a function

[qalqi]

Error

TypeError: pid.toBlob is not a function

for js

import { Ed25519KeyIdentity } from '@dfinity/identity';

const keypair = Ed25519KeyIdentity.generate();
console.log(address_to_hex(principal_id_to_address(keypair.getPrincipal()))); 
//7xxxxxxxxxxxxxxxxxx

breaking with @dfinity/agent@0.9.1 and was working at @dfinity/agent@0.9.0