Fixtures get loaded on composer install --env=prod --no-dev

[neumanniTech]

Hello,
we have the following problem with the DoctrineFixturesBundle when we want to install our project on our live server.
When we run for example composer install --env=prod --no-dev and after this the cache:clear script in composer.json gets executed we get the following error:

Executing script cache:clear [KO]
[KO]
Script cache:clear returned with error code 1
!!
!!   // Clearing the cache for the prod environment with debug false
!!
!!  In AbstractRecursivePass.php line 179:
!!                                                                                                                                                            
!!    Invalid service "App\DataFixtures\AppFixtures": class "Doctrine\Bundle\FixturesBundle\Fixture" not found while loading "App\DataFixtures\AppFixtures".  
!!                                                                                                                                                            
!!
!!  cache:clear [--no-warmup] [--no-optional-warmers]
!!
!!
Script @auto-scripts was called via post-install-cmd

Our composer.json

 {
    "type": "project",
    "license": "proprietary",
    "minimum-stability": "stable",
    "prefer-stable": true,
    "require": {
        "php": ">=8.1",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "cuyz/valinor-bundle": "^0.2.1",
        "doctrine/doctrine-bundle": "^2.10",
        "doctrine/doctrine-migrations-bundle": "^3.2",
        "doctrine/orm": "^2.16",
        "knpuniversity/oauth2-client-bundle": "^2.15",
        "phpdocumentor/reflection-docblock": "^5.3",
        "phpoffice/phpword": "^1.1",
        "phpstan/phpdoc-parser": "^1.24",
        "stof/doctrine-extensions-bundle": "^1.8",
        "symfony/asset": "6.3.*",
        "symfony/console": "6.3.*",
        "symfony/doctrine-messenger": "6.3.*",
        "symfony/dotenv": "6.3.*",
        "symfony/expression-language": "6.3.*",
        "symfony/flex": "^2",
        "symfony/form": "6.3.*",
        "symfony/framework-bundle": "6.3.*",
        "symfony/http-client": "6.3.*",
        "symfony/intl": "6.3.*",
        "symfony/mailer": "6.3.*",
        "symfony/mime": "6.3.*",
        "symfony/monolog-bundle": "^3.0",
        "symfony/notifier": "6.3.*",
        "symfony/process": "6.3.*",
        "symfony/property-access": "6.3.*",
        "symfony/property-info": "6.3.*",
        "symfony/runtime": "6.3.*",
        "symfony/security-bundle": "6.3.*",
        "symfony/serializer": "6.3.*",
        "symfony/string": "6.3.*",
        "symfony/translation": "6.3.*",
        "symfony/twig-bundle": "6.3.*",
        "symfony/validator": "6.3.*",
        "symfony/web-link": "6.3.*",
        "symfony/yaml": "6.3.*",
        "thenetworg/oauth2-azure": "^2.2",
        "twig/extra-bundle": "^2.12|^3.0",
        "twig/twig": "^2.12|^3.0"
    },
    "config": {
        "allow-plugins": {
            "php-http/discovery": true,
            "symfony/flex": true,
            "symfony/runtime": true
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-ctype": "*",
        "symfony/polyfill-iconv": "*",
        "symfony/polyfill-php72": "*",
        "symfony/polyfill-php73": "*",
        "symfony/polyfill-php74": "*",
        "symfony/polyfill-php80": "*",
        "symfony/polyfill-php81": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "allow-contrib": false,
            "require": "6.3.*"
        }
    },
    "require-dev": {
        "deployer/deployer": "^7.3",
        "doctrine/doctrine-fixtures-bundle": "^3.4",
        "phpunit/phpunit": "^9.5",
        "symfony/browser-kit": "6.3.*",
        "symfony/css-selector": "6.3.*",
        "symfony/debug-bundle": "6.3.*",
        "symfony/maker-bundle": "^1.0",
        "symfony/phpunit-bridge": "^6.3",
        "symfony/stopwatch": "6.3.*",
        "symfony/web-profiler-bundle": "6.3.*"
    }
}

The problem exist also when we create a fresh new symfony project.