OpenAPI 3.1.0 support: Schemas titles are no more displayed

Q&A

• Method of installation: unpkg.com dist assets
• Swagger-UI version: 5.9.0
• OpenAPI version: 3.1.0

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.1.0
...
components:
  schemas:
    response-wrapper:
      title: ResponseWrapper
      type: object

Swagger-UI configuration options:

SwaggerUIBundle({
    url: "open-api.yaml",
    dom_id: "#swagger-ui",
    filter: true,
    docExpansion: "list",
    deepLinking: true, 
    presets: [
      SwaggerUIBundle.presets.apis,
      SwaggerUIBundle.SwaggerUIStandalonePreset,
    ],
    plugins: [SwaggerUIBundle.plugins.DownloadUrl],
});

Describe the bug you're encountering

While upgrading to OpenAPI version 3.1.0, the titles of the schemas are no longer displayed.

Instead, I see the path specified in the components/schemas (response-wrapper).

If I revert to version 3.0.0, it works again.

To reproduce...

Steps to reproduce the behavior:
Upgrade to OpenAPI version 3.1.0.

Expected behavior

I should see the contents of the title property displayed:

Start by reproducing the supplied OpenAPI 3.1.0 schema in Swagger UI 5.9.0, then compare its rendered title with the same schema under 3.0.0. Trace the schema display path used for components/schemas; done means the ResponseWrapper title is shown instead of response-wrapper, with regression coverage if the existing test structure identifies a suitable location.