Can't resolve reference on valid spec

[jtburchfield]

Describe the bug

I get an error sending a request into my express api. I have validated my schema and also the schema generated from @apidevtools/json-schema-ref-parser and both are valid. When I use @apidevtools/json-schema-ref-parser to generate a json bundle, using $refParser.bundle, the schema produced has an internal link from updatedAt to createdAt, which seems to be the issue.

To Reproduce
Use the following schema:

openapi.yaml

---
openapi: 3.0.0
info:
  version: 1.0.0
  title: My Service
paths:
  /test:
    get:
      operationId: GetTest
      responses:
        '200':
          description: OK.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReturnData'

components:
  schemas:
    ReturnData:
      type: object
      required:
        - createdAt
      properties:
        createdAt:
          $ref: './types.yaml#/components/schemas/DateTime'
        updatedAt:
          $ref: './types.yaml#/components/schemas/DateTime'

types.yaml

---
openapi: 3.0.0
info:
  version: 0.1.0
  title: Date/Time Types
paths: {}
components:
  schemas:
    DateTime:
      type: string
      format: date-time

If I modify the openapi.yaml file and remove the reference to the types.yaml file and hard-code the date-time format everything works
as expected.

Actual behavior
Error: can't resolve reference #/components/schemas/ReturnData/properties/createdAt from id #/components/schemas/ReturnData

Expected behavior
Validation successful

Generated by $refParser.bundle

    "openapi": "3.0.0",
    "info": {
        "version": "1.0.0",
        "title": "My Service"
    },
    "paths": {
        "/test": {
            "get": {
                "operationId": "GetTest",
                "responses": {
                    "200": {
                        "description": "OK.",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/ReturnData"
                                }
                            }
                        }
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "ReturnData": {
                "type": "object",
                "required": [
                    "createdAt"
                ],
                "properties": {
                    "createdAt": {
                        "type": "string",
                        "format": "date-time"
                    },
                    "updatedAt": {
                        "$ref": "#/components/schemas/ReturnData/properties/createdAt"
                    }
                }
            }
        }
    }
}