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

Beginne damit, den bereitgestellten Reproducer mit mypy 1.8.0 auszuführen, und bestätige den Fehler wegen inkompatibler Typen im Zusammenhang mit typing.Self und dem generischen AttributeValueT. Verfolge die Behandlung von Self für Methoden in Generic-Klassen und füge anschließend einen Regressionstest hinzu, der zeigt, dass self ohne type ignore akzeptiert wird und die Testsuite erfolgreich durchläuft.