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

Start by running the provided reproducer with mypy 1.8.0 and confirm the incompatible-type error involving typing.Self and the generic AttributeValueT. Trace the Self handling for methods on Generic classes, then add a regression test showing that self is accepted without a type ignore and that the test suite passes.