oas3-valid-schema-example reports error when `oneOf` is used with `additionalProperties: false`

[JAdshead]

Description

When validating a document which uses oneOf for a object property combined with additionalProperties: false oas3-valid-schema-example reports an error of Property "[X]" is not expected to be here when there is a correct match on the example.

While I believe this to be a bug Id be happy to be proven wrong as its possible I am missing something.

To Reproduce

Schema:

openapi: 3.0.0
info:
  title: oas3-valid-schema-example
  description: 'example of document oas3-valid-schema-example with oneOf'
  version: '1.0'
  contact:
    name: API Owner
servers:
  - url: 'https://api.example.com'
paths:
  /my-api:
    get:
      description: 'Example endpoint with oneOf in response'
      operationId: getExampleWithOneOf
      summary: 'Get example with oneOf'
      responses:
        '200':
          description: 'Successful response'
          content:
            application/json:
              schema:
                type: object
                additionalProperties: false
                oneOf:
                  - type: 'object'
                    additionalProperties: false
                    required:
                      - 'url'
                    properties:
                      url:
                        type: 'string'
                      width:
                        type: 'integer'
                      height:
                         type: 'integer'
                example:
                  url: 'images/38.png'
                  width: 100
                  height: 100

ruleset.yaml file extending oas ruleset:

extends: ["spectral:oas"]

npx @stoplight/spectral-cli lint --ruleset=ruleset.yaml ./valid-schema-example-document.yml

Results in:

./valid-schema-example-document.yml
 43:25    error  oas3-valid-schema-example  Property "url" is not expected to be here          paths./my-api.get.responses[200].content.application/json.schema.example

Expected behavior

I would expect that no error is reported as url is valid.

Additional context

When providing an invalid example e.g. changing url to urls the reported errors are what i would expect

given

example:
  urls: 'images/38.png'
  width: 100
  height: 100

results in:

36:25    error  oas3-valid-schema-example  "example" property must have required property "url"       paths./my-api.get.responses[200].content.application/json.schema.example
 36:25    error  oas3-valid-schema-example  "example" property must match exactly one schema in oneOf  paths./my-api.get.responses[200].content.application/json.schema.example

Can add the following to the rules tests to also reproduce.

{
  name: `${field} containing a valid complex example using oneOf`,
  document: {
    openapi: '3.0.2',
    [field]: {
      schema: {
        type: 'object',
        properties: {},
        additionalProperties: false,
        oneOf: [{
          type: 'object',
          additionalProperties: false,
          required: ['url'],
          properties: {
            url: {
              type: 'string',
            },
            width: {
              type: 'integer',
            },
            height: {
              type: 'integer',
            },
          },
        }],
        example: {
          url: 'images/38.png',
          width: 100,
          height: 100,
        },
      },
    },
  },
  errors: [],
},