API Calls Not Using Server from OpenAPI Spec

[perusopersonale]

Environment

• OS: Ubuntu
• Browser: Brave (Version 1.73.89, Chromium: 131.0.6778.69)
• Installation Method: npm
• Swagger-UI Version: 4.18.3
• Swagger/OpenAPI Version: OpenAPI 3.0

Issue Description

I'm integrating swagger-ui into a React app and have imported the Petstore definition. My React component looks like this:

<SwaggerUI spec={document} />

The Swagger-UI renders correctly, but when I use the "Try it out" functionality, the API calls are sent to:
http://localhost:5173/api/v3/pet

I expected these calls to point to the server defined in the OpenAPI specification from the JSON file.

I’m aware that I can use a hook to override the URL, but I was under the impression this should work out of the box.

Question:

Is this behavior expected?
Are there any solutions to address this issue other than using the hook?