Unexpected fetch() when trying to resolve schema with a circular reference

[ak1394]

I'm using swagger-ui-react 5.18.2 passing a spec to display through the spec attribute of a SwaggerUI component.

Some time after I upgraded from 4.18.1 of swagger-ui-react I've started noticing an error messages like the one below, when trying to render a spec that contains a circular reference:

Resolver error at components.schemas.Pet.properties.children.$ref Could not resolve reference: Failed to fetch

It looks like SwaggerUI tries to do a fetch() with a URL of a page where the component is being used, and fails. (There is no URL for the spec available, as the url parameter is not used.)

I'm attaching an OpenAPI in question and a screenshot of the UI with the error message. The error is shown when the "Pet" schema is expanded.

recursive-petstore-example.yaml.txt