allOf validation not working?

Reproduce la solicitud JSON PATCH contra /pets utilizando el documento OpenAPI proporcionado y la referencia allOf del esquema Cat a Pet. Sigue cómo el validador resuelve Pet y su propiedad heredada pet_type, y determina después si la solicitud se acepta o por qué la validación la rechaza. En el issue no se mencionan archivos de proyecto ni pruebas.

Hi, I'm having issues getting an example spec using allOf to work. This is the spec, as provided by the OpenAPI docs:

openapi: 3.0.0
info:
  title: AllOf.v1
  version: '1.0'
servers:
  - url: 'http://localhost:3000'
paths:
  /pets:
    patch:
      requestBody:
        content:
          application/json:
            schema:
              oneOf:
                - $ref: '#/components/schemas/Cat'
                - $ref: '#/components/schemas/Dog'
              discriminator:
                propertyName: pet_type
      responses:
        '200':
          description: Updated
components:
  schemas:
    Pet:
      type: object
      required:
        - pet_type
      properties:
        pet_type:
          type: string
    Dog: # "Dog" is a value for the pet_type property (the discriminator value)
      allOf: # Combines the main `Pet` schema with `Dog`-specific properties
        - $ref: '#/components/schemas/Pet'
        - type: object
          # all other properties specific to a `Dog`
          properties:
            bark:
              type: boolean
            breed:
              type: string
              enum: [ Dingo, Husky, Retriever, Shepherd ]
    Cat: # "Cat" is a value for the pet_type property (the discriminator value)
      allOf: # Combines the main `Pet` schema with `Cat`-specific properties
        - $ref: '#/components/schemas/Pet'
        - type: object
          # all other properties specific to a `Cat`
          properties:
            hunts:
              type: boolean
            age:
              type: integer

My test attempts to send a JSON PATCH request to the /pets endpoint, using:

[
    'pet_type' => 'Cat',
    'age' => 3,
    'hunts' => true,
]

However, this only results in:

Request body did not match provided JSON schema.

Digging in a bit more, it appears that the validator doesn't see the pet_type property it should be inheriting from the Pet component.

Any experience with this, or ideas? Thanks in advance.