Swagger UI does not display value for an Example with example set to zero

[webdevilopers]

I'm using a slightly older setup:

    "require": {
        "php": "^7.2",
        "ext-ctype": "*",
        "ext-gd": "*",
        "ext-iconv": "*",
        "ext-mongodb": "*",
        "ext-yaml": "*",
        "aws/aws-sdk-php-symfony": "^2.6.1",
        "beberlei/doctrineextensions": "^1.3.0",
        "doctrine/doctrine-bundle": "^2.7.2",
        "doctrine/mongodb-odm": "^2.4.3",
        "doctrine/mongodb-odm-bundle": "^4.5.3",
        "doctrine/orm": "^2.14.3",
        "jms/serializer-bundle": "*",
        "knplabs/knp-snappy": "^1.4.2",
        "knplabs/knp-snappy-bundle": "^1.8.0",
        "lexik/jwt-authentication-bundle": "^2.19.1",
        "mongodb/mongodb": "^1.11.0",
        "nelmio/api-doc-bundle": "^4.11.1",
        "nelmio/cors-bundle": "^2.3.1",
        "phpoffice/phpspreadsheet": "^1.19.0",
        "ramsey/uuid": "^4.2.3",
       "symfony/asset": "^5.4.21",
        "symfony/console": "^5.4.26",
        "symfony/dotenv": "^5.4.22",
        "symfony/framework-bundle": "^5.4.26",
        "symfony/messenger": "^5.4.26",
        "symfony/monolog-bundle": "^3.8.0",
        "symfony/runtime": "^5.4.26",
        "symfony/translation": "^5.4.24",
        "symfony/twig-bundle": "^5.4.27",
        "symfony/validator": "^5.4.26",
        "symfony/yaml": "^5.4.23"
    },

I'm defining a parameter with example set to zero:

     * @OA\Parameter(
     *   name="workInstructionImagesPerPage",
     *   in="query",
     *   description="Number of work instructions per page.",
     *   required=true,
     *   @OA\Schema(type="integer"),
     *   @OA\Examples(example="0", value="0", summary="No images."),
     *   @OA\Examples(example="1", value="1", summary="Single image per page."),
     *   @OA\Examples(example="2", value="2", summary="Two images per page."),
     *   @OA\Examples(example="3", value="3", summary="Three images per page.")
     * )

That results in the following Swagger UI HTML:

The zero value is not shown in the input. Instead the placeholder appears:

I can workaround by moving the line to the bottom:

     * @OA\Parameter(
     *   name="workInstructionImagesPerPage",
     *   in="query",
     *   description="Number of work instructions per page.",
     *   required=true,
     *   @OA\Schema(type="integer"),
     *   @OA\Examples(example="1", value="1", summary="Single image per page."),
     *   @OA\Examples(example="2", value="2", summary="Two images per page."),
     *   @OA\Examples(example="3", value="3", summary="Three images per page."),
     *   @OA\Examples(example="0", value="0", summary="No images.")
     * )

That results in the following Swagger UI HTML with the same(!) select but correct input value:

The zero value is shown:

But having the zero value at the top does not seem to be the problem. When adding another line with zero value but a different example name...

     * @OA\Parameter(
     *   name="workInstructionImagesPerPage",
     *   in="query",
     *   description="Number of work instructions per page.",
     *   required=true,
     *   @OA\Schema(type="integer"),
     *   @OA\Examples(example="0", value="0", summary="No images."),
     *   @OA\Examples(example="no", value="0", summary="No images2."),
     *   @OA\Examples(example="1", value="1", summary="Single image per page."),
     *   @OA\Examples(example="2", value="2", summary="Two images per page."),
     *   @OA\Examples(example="3", value="3", summary="Three images per page.")
     * )

...the following HTML is rendered:

@pascalf22 used a similar example in his issue but apparently without problems: https://github.com/zircote/swagger-php/issues/1145