bug: can't unselect first `oneOf` option inside "Try It" (OAS3.0)

[LuccaBitfly]

Using OpenAPI 3.0, when having an object field with oneOf inside a request body schema, it is not possible to unselect the first listed oneOf option in the UI. For example, using this this as a request body schema:

OneOfSchema:
  type: object
  properties:
    test:
      oneOf:
        - title: "Number input"
          type: object
          properties:
            number_input:
              type: number
        - title: "String input"
          type: object
          properties:
            string_input:
              type: string

When selecting the "String input" option in the "Try It" window:

Then the data preview still shows the example placeholder for the first option, i.e. number_input:

I would expect it to deselect the first option when selecting a different oneOf field, so the payload shown should be:

{
  "test": {
    "string_input": "test test"
  }
}