False positive typing.Self has incompatible type when method uses class' generic type

Bug Report

mypy seems to get confused about type of typing.Self, when class is also typing.Generic, inside methods if a parameter has
the same type as the class Generic's TypeVar.

To Reproduce

from collections.abc import Awaitable, Callable
from typing import Generic, Self, TypeVar

AttributeValueT = TypeVar("AttributeValueT")


class Attribute(Generic[AttributeValueT]):
    def __init__(self, on_changed: Callable[[Self], Awaitable[None]]) -> None:
        self._on_changed = on_changed

    async def bar(self, _: AttributeValueT) -> None:
        # Argument 1 has incompatible type "Attribute[AttributeValueT]"; expected "Self"  [arg-type]
        await self._on_changed(self)  # type: ignore[arg-type]

Expected Behavior

I expect self / Self to have the correct type and to be able to avoid # type: ignore[arg-type]

Actual Behavior

See mypy error is in method comment above; error only makes sense with code as context.

Your Environment

• Mypy version used: mypy 1.8.0 (compiled: yes)
• Python version used: 3.11.7

Inizia eseguendo il riproduttore fornito con mypy 1.8.0 e conferma l'errore di tipo incompatibile che coinvolge typing.Self e l'AttributeValueT generico. Traccia la gestione di Self per i metodi nelle classi Generic, quindi aggiungi un test di regressione che dimostri che self viene accettato senza type ignore e che la suite di test passa.