Q&A (please complete the following information)

• OS: Windows
• Browser: Chrome
• Version: latest
• Method of installation: dist
• Swagger-UI version: 3.18.3
• Swagger/OpenAPI version: OpenAPI 3.0

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.0
info:
  version: 0.0.1
  title: "Swagger Petstore"
tags:
- name: "pet/list"
  description: "Everything about your Pets"
paths:
  /pet:
    get:
      tags:
      - "pet/list"
      summary: "Returns all pets"
      responses:
        "200":
          description: OK  

Swagger-UI configuration options:

const ui = SwaggerUIBundle({
          url: "/docs/rest-api-swagger.yaml",
          dom_id: '#swagger-ui',
          deepLinking: true,
          docExpansion: "none",
          validatorUrl: null,
          presets: [
            SwaggerUIBundle.presets.apis,
            SwaggerUIStandalonePreset
          ]
          layout: "StandaloneLayout"
        )

?yourQueryStringConfig

Describe the bug you're encountering

To reproduce...

Steps to reproduce the behavior:

1. Start the dev server with the config from above
2. Go to http://0.0.0.0:3200/#/pet%2Flist
3. Observe that the pet operation is not unfolded

Expected behavior

Deep linking works

Additional context or thoughts

Similar issue has been reported for spaces and that has been fixed:
#4120