Resolver error: Could not resolve reference: Could not resolve pointer:

• OS: macOS
• Browser: chrome, safari, firefox
• Version: [e.g. 22]
• Method of installation: npm
• Swagger-UI version: > 5.17.2
• Swagger/OpenAPI version: OpenAPI 3.0

Content & configuration

openapi: 3.0.0
info:
  title: Test API
  description: test spec
  version: 0.0.1
paths:
  /test/v1/endpoint:
    get:
      parameters:
      - $ref: http://localhost:3000/oas/test-domain-v1~0.0.1.yaml#/components/parameters/A
      - $ref: http://localhost:3000/oas/test-domain-v1~0.0.1.yaml#/components/parameters/B
      responses:
        '200':
          description: Success.
          content:
            application/json:
              schema:
                $ref: http://localhost:3000/oas/test-domain-v1~0.0.1.yaml#/components/parameters/A

Describe the bug you're encountering

I have refs retrieved through an API endpoint. They are properly returned and resolved inside the editor. However, swagger-ui has a problem resolving them.
When expanding an operation an error displays:

Resolver error at paths./test/v1/endpoint.get.parameters.0.$ref
Could not resolve reference: Could not resolve pointer: /components/parameters/A does not exist in document

Screenshots

Expected behavior

Additional context or thoughts

Interestingly, when added the reference files to the public folder and referencing them through there, there is no error. However it is undesirable to require a new build every time a ref is modified or added to the referenced file.

No source file or test is named. Start by reproducing the external $ref case in Swagger UI with the provided OpenAPI 3.0 configuration, then trace the resolver handling for API-served references; done means the remote components/parameters resolve when the operation is expanded without requiring files in the public folder.