Custom Controller via POST accessible, not via GET-Collection

[cloudmaker97]

API Platform version(s) affected: 3.2

Description
I've tried to create a custom endpoint for retrieving the user details for the current authenticated user. It took me several hours to figure out, why it doesn't worked as seen on the documentation. I tried this even in YAML, as even in the PHP-Attribute Version. When using POST-Attribute, the route is correct and the Controller is responding with the correct data from the method. When i try to access the same (as required) with a GET-Attribute, i get always 404 error. The code examples are shown below in additional context.

How to reproduce

Not working example with GET-Collection

#[GetCollection(
    controller: UserController::class,
    openapi: new Operation(
        summary: 'Get the current user details',
        description: 'Get the current user details',
        requestBody: new RequestBody(),
    ),
    security: 'is_granted("ROLE_USER")',
    name: 'app_user_current'
)]

Working example with POST

Exactly the same, only change has been made in the first line

#[Post(
    uriTemplate: '/api/users/current',
    controller: UserController::class,
    openapi: new Operation(
        summary: 'Get the current user details',
        description: 'Get the current user details',
        requestBody: new RequestBody(),
    ),
    security: 'is_granted("ROLE_USER")',
    name: 'app_user_current'
)]

Code from the Controller

#[Route('/api/users/current', name: 'app_user_current')]
public function test(): Response
{
    $user = $this->entityManager->getRepository(User::class)->find($this->getUser()->getId());
    $returnData = [
        'id' => $user->getId(),
        'email' => $user->getEmail(),
        'firstname' => $user->getFirstname(),
        'lastname' => $user->getLastname(),
        'roles' => $user->getRoles(),
    ];
    return $this->json($returnData);
}

Additional Context

The SwaggerUI is showing the route in both variants, but the GET-Response is always 404 not found. The Symfony router debug command is showing these routes also in both variants.

Error-Response when requesting via GET-Request

{
  "title": "An error occurred",
  "detail": "Not Found",
  "status": 404,
  "type": "/errors/404",
  "trace": [
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Bundle/SwaggerUi/SwaggerUiProvider.php",
      "line": 48,
      "function": "provide",
      "class": "ApiPlatform\\State\\Provider\\ReadProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Security/State/AccessCheckerProvider.php",
      "line": 53,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Bundle\\SwaggerUi\\SwaggerUiProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/State/Provider/DeserializeProvider.php",
      "line": 47,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Security\\State\\AccessCheckerProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Security/State/AccessCheckerProvider.php",
      "line": 53,
      "function": "provide",
      "class": "ApiPlatform\\State\\Provider\\DeserializeProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Validator/State/QueryParameterValidateProvider.php",
      "line": 42,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Security\\State\\AccessCheckerProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Validator/State/ValidateProvider.php",
      "line": 32,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Validator\\State\\QueryParameterValidateProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Security/State/AccessCheckerProvider.php",
      "line": 53,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Validator\\State\\ValidateProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/State/Provider/ContentNegotiationProvider.php",
      "line": 56,
      "function": "provide",
      "class": "ApiPlatform\\Symfony\\Security\\State\\AccessCheckerProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/api-platform/core/src/Symfony/Controller/MainController.php",
      "line": 82,
      "function": "provide",
      "class": "ApiPlatform\\State\\Provider\\ContentNegotiationProvider",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/symfony/http-kernel/HttpKernel.php",
      "line": 178,
      "function": "__invoke",
      "class": "ApiPlatform\\Symfony\\Controller\\MainController",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/symfony/http-kernel/HttpKernel.php",
      "line": 76,
      "function": "handleRaw",
      "class": "Symfony\\Component\\HttpKernel\\HttpKernel",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/symfony/http-kernel/Kernel.php",
      "line": 185,
      "function": "handle",
      "class": "Symfony\\Component\\HttpKernel\\HttpKernel",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php",
      "line": 35,
      "function": "handle",
      "class": "Symfony\\Component\\HttpKernel\\Kernel",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/vendor/autoload_runtime.php",
      "line": 29,
      "function": "run",
      "class": "Symfony\\Component\\Runtime\\Runner\\Symfony\\HttpKernelRunner",
      "type": "->"
    },
    {
      "file": "/var/www/html/backend/public/index.php",
      "line": 5,
      "function": "require_once"
    }
  ]
}

Thank you for your amazing work! ❤️