Default values inconsistencies with path file refs and path params

When using file refs with paths the parser doesn't fill parameter fields with default values. For example this ref configuration:

openapi: 3.0.0
info:
  version: 1.0.0
  title: Swagger Test
  license:
    name: MIT
servers:
  - url: /
paths:
  /api/pet/{petId}:
    $ref: "file.yaml"

get:
  summary: Info for a specific pet
  operationId: getById
  parameters:
    - name: petId
      in: path
      required: true
      description: The id of the pet to retrieve
      schema:
        type: integer
  responses:
    200:
      description: Expected response to a valid request

Generates this POJO:

class PathParameter {
    class Parameter {
        name: petId
        in: null
        description: The id of the pet to retrieve
        required: null
        deprecated: null
        allowEmptyValue: null
        style: null
        explode: null
        allowReserved: null
        schema: class IntegerSchema {
            class Schema {
                title: null
                multipleOf: null
                maximum: null
                exclusiveMaximum: null
                minimum: null
                exclusiveMinimum: null
                maxLength: null
                minLength: null
                pattern: null
                maxItems: null
                minItems: null
                uniqueItems: null
                maxProperties: null
                minProperties: null
                required: null
                type: null
                not: null
                properties: null
                additionalProperties: null
                description: null
                format: null
                $ref: null
                nullable: null
                readOnly: null
                writeOnly: null
                example: null
                externalDocs: null
                deprecated: null
                discriminator: null
                xml: null
            }
            type: integer
            format: null
            _default: null
            _enum: null
        }
        examples: null
        example: null
        content: null
        $ref: null
    }
    in: path
    required: true
}

While, with same spec but all inside same file, I receive this:

class PathParameter {
    class Parameter {
        name: petId
        in: null
        description: The id of the pet to retrieve
        required: null
        deprecated: null
        allowEmptyValue: null
        style: simple
        explode: false
        allowReserved: null
        schema: class IntegerSchema {
            class Schema {
                title: null
                multipleOf: null
                maximum: null
                exclusiveMaximum: null
                minimum: null
                exclusiveMinimum: null
                maxLength: null
                minLength: null
                pattern: null
                maxItems: null
                minItems: null
                uniqueItems: null
                maxProperties: null
                minProperties: null
                required: null
                type: null
                not: null
                properties: null
                additionalProperties: null
                description: null
                format: null
                $ref: null
                nullable: null
                readOnly: null
                writeOnly: null
                example: null
                externalDocs: null
                deprecated: null
                discriminator: null
                xml: null
            }
            type: integer
            format: int32
            _default: null
            _enum: null
        }
        examples: null
        example: null
        content: null
        $ref: null
    }
    in: path
    required: true
}

Note that style, explode, schema.format are inconsistent

I don't know if the same bug exists for remote http refs too. Swagger parser 2.0.8