Example request body for multipart/form-data POST isn't used by "Try it out"

Content & configuration

Swagger/OpenAPI definition:

openapi: 3.1.0
info:
 title: Test
 version: '0.0.1'
paths:
 /example:
   post:
     summary: Example endpoint
     operationId: example_endpoint
     parameters: []
     requestBody:
       required: true
       content:
         multipart/form-data:
           schema:
             type: object
             required:
               - required_field
             properties:
               required_field:
                 type: string
                 minLength: 1
               optional_field:
                 type: string
             example:
               required_field: foo
     responses:
       "200":
         description: OK

Swagger-UI configuration options:

SwaggerUI({
 // I am using https://editor-next.swagger.io/
})

Is your feature request related to a problem?

Clicking the "Try it out" button for my example endpoint gives the following initial form state:

Instead of using the example provided.

Describe the solution you'd like

I would like the initial form state to be the following

(required_field="foo" and optional_field omitted) to reflect the example given.

Describe alternatives you've considered

I've played around with different ways of specifying the request body and the example. Nothing seems to produce this result in the swagger UI.

Start with the OpenAPI 3.1 definition and Swagger UI configuration included in the issue, then reproduce the behavior through the multipart/form-data endpoint's "Try it out" form. Done means the form initializes required_field with "foo" from the request-body example while leaving optional_field omitted.