[BUG] `is not of type 'object'` when `#/` referencing

Bug Report Checklist

[x] Have you provided a full/minimal spec to reproduce the issue?
[x] Have you validated the input using an OpenAPI validator (example)?
[x] Have you tested with the latest master to confirm the issue still exists?
[x] Have you searched for related issues/PRs?
[x] What's the actual output vs expected output?

Description

I've been following the idea from https://github.com/OAI/OpenAPI-Specification/issues/1590#issuecomment-786447707 to "override" required field.

MySchema.yaml

type: object
properties:
  foo: 
    type: integer
  bar:
    type: integer
required:
  - foo
  - bar

src/spec.yaml

patch:      
  summary: Update something
  requestBody:
    content:                                     
      application/json:
        schema:
          type: object
          properties:
            $ref: ../components/schemas/MySchema.yaml#/properties

The generator fails on:

-attribute paths.'.....requestBody.content.'application/json'.schema.properties is not of type `object`

It feels like validation ignores #/properties. bundling with -dereference however recognizes the reference correctly and works fine but applying generator on a bundled & dereferenced spec is a so-so workaround because it loses the filename context and generated DTOs have very clunky naming.

I also tried to walk around this by having: MySchemaProps.yaml

foo: 
    type: integer
  bar:
    type: integer

MySchema.yaml

type: object
properties:
  $ref: './MySchemaProps.yaml'

to avoid #/ ref, but I get

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `io.swagger.v3.oas.models.media.ObjectSchema` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('./MySchemaProps.yaml')
 at [Source: UNKNOWN; byte offset: #UNKNOWN]

Again, bundling with -dereference works fine on this too but not generator.

Neither works an example from spec: https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.2.md#models-with-composition all allOf props in Kotlin generator goes to some weird allOf-prefixed data class and there is no DTO with all of the properties in one place.

openapi-generator version

6.2.1

OpenAPITools / openapi-generator