Inherited instance attributes are not documented

[AWhetter]

class MyBaseException(Exception):
    def __init__(self):
        self.my_message: str = "This is my message"
        """The message."""
        super().__init__(self.my_message)

class MyException(MyBaseException):
    pass

# conf.py
autoapi_options = ['members', 'imported-members', 'inherited-members', 'show-module-summary']

MyException is documented as having not attributes, but it should document the inherited my_message attribute.