aiogram3 maybe bug

reproduce.py

import logging
from typing import Any

from aiogram import Bot, Dispatcher
from config import TOKEN

dp = Dispatcher()

logger = logging.getLogger(__name__)


@dp.message(commands={'a'})
async def echo_handler() -> Any:
    #TypeError: echo_handler() takes 0 positional arguments but 1 was given
    ...

@dp.message(commands={'b'})
async def echo_handler2(bot: Bot) -> Any:
    #TypeError: echo_handler2() got multiple values for argument 'bot'
    ...

def main() -> None:
    bot = Bot(TOKEN, parse_mode="HTML")
    dp.run_polling(bot)


if __name__ == "__main__":
    main()