async with has a different interface from AsyncContextManager?

[decorator-factory]

I'm not sure whether the issue is with aiohttp, typeshed or pyright...

from typing import Any, AsyncContextManager
from aiohttp import ClientSession


async def f():
    async with ClientSession() as session:
        print(session)


async def g():
    ctx: AsyncContextManager[Any] = ClientSession()
    async with ctx as session:
        print(session)

f works and typechecks fine. However, I get an error on the second function, the ctx: ... line:

Expression of type "ClientSession" cannot be assigned to declared type "AsyncContextManager[Any]"
  "ClientSession" is incompatible with protocol "AsyncContextManager[Any]"
    "__aexit__" is an incompatible type
      Type "(exc_type: Type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None) -> Coroutine[Any, Any, None]" cannot be assigned to type "(exc_type: Type[BaseException] | None, exc_value: BaseException | None, traceback: TracebackType | None) -> Awaitable[bool | None]"
        Parameter name mismatch: "exc_value" versus "exc_val"
        Parameter name mismatch: "traceback" versus "exc_tb"

mypy doesn't report any errors

[decorator-factory]

sorry, looks like it's an issue in typeshed after all - also fixed in the latest version of pyright