Path parameter with ref schema does not work

swagger-request-validator-core version 2.28.2.

Validator configuration:

ParseOptions parseOptions = new ParseOptions();
parseOptions.setResolve(true);
parseOptions.setResolveFully(false);
parseOptions.setResolveCombinators(true);

LevelResolver levelResolver = LevelResolver.create()
                .withLevel("validation.schema.additionalProperties", IGNORE)
                .build();

OpenAPI openApi = loadOpenApi(parseOptions);

OpenApiInteractionValidator.Builder builder = OpenApiInteractionValidator
        .createFor(openApi)
        .withParseOptions(parseOptions)
        .withLevelResolver(levelResolver);

OpenApi:

---
openapi: 3.0.3
info:
  title: ref error
  version: v1
security:
- bearerAuth: []
paths:
  /valuation/{byIdType}/{id}:
    get:
      operationId: getValuations
      parameters:
      - name: byIdType
        in: path
        required: true
        schema:
          $ref: '#/components/schemas/FindByIdType'
      - name: id
        in: path
        description: Id
        required: true
        schema:
          type: string
      responses:
        "200":
          description: Valuations
        "400":
          description: Invalid input
        "404":
          description: Car not found
components:
  schemas:
    FindByIdType:
      description: The possible identifiers types
      enum:
      - ID_1
      - ID_2
      type: string

Making a GET request to /valuation/ID1/1337 results in the following error:

    "messages": [
        {
            "key": "validation.request.parameter.schema.invalidJson",
            "level": "ERROR",
            "message": "Unable to parse JSON - Unrecognized token 'ID_1': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')\n at [Source: (String)\"ID_1\"; line: 1, column: 14].",
            "context": {
                "requestPath": "/valuation/ID_1/1337",
                "parameter": {
                    "name": "byIdType",
                    "in": "path",
                    "required": true,
                    "style": "SIMPLE",
                    "explode": false,
                    "schema": {
                        "$ref": "#/components/schemas/FindByIdType",
                        "exampleSetFlag": false
                    }
                },
                "location": "REQUEST",
                "requestMethod": "GET"
            }
        }
    ]
}

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