Decorating JsonLd ItemNormalizer

In API Platform, I am trying to decorate the service api_platform.jsonld.normalizer.item (class ApiPlatformJsonLdSerializerItemNormalizer).

I notice this is causing some strange behavior in my application. For example, I get an error Specified class AppDtoFileFileMultipleResponseDto is not a resource class. which is not showing before setting up the decorator.

Here is my decorator :

<?php

declare(strict_types=1);

namespace AppSerializer;

use SymfonyComponentDependencyInjectionAttributeAsDecorator;
use SymfonyComponentSerializerExceptionLogicException;
use SymfonyComponentSerializerNormalizerCacheableSupportsMethodInterface;
use SymfonyComponentSerializerNormalizerDenormalizerInterface;
use SymfonyComponentSerializerNormalizerNormalizerInterface;
use SymfonyComponentSerializerSerializerAwareInterface;
use SymfonyComponentSerializerSerializerInterface;

#[AsDecorator('api_platform.jsonld.normalizer.item')]
class ItemJsonLdNormalizer implements NormalizerInterface, DenormalizerInterface, SerializerAwareInterface, CacheableSupportsMethodInterface
{

    public function __construct(
        private readonly NormalizerInterface $normalizer,
    ) {}


    public function normalize(mixed $object, string $format = null, array $context = []): array|string|int|float|bool|ArrayObject|null
    {
        return $this->normalizer->normalize($object, $format, $context);
    }

    public function supportsDenormalization(mixed $data, string $type, string $format = null, array $context = []): bool
    {
        return $this->normalizer->supportsDenormalization($data, $type, $format, $context);
    }

    public function denormalize(mixed $data, string $type, string $format = null, array $context = []): mixed
    {
        return $this->normalizer->denormalize($data, $type, $format, $context);
    }

    public function hasCacheableSupportsMethod(): bool
    {
        return $this->normalizer->hasCacheableSupportsMethod();
    }

    public function supportsNormalization(mixed $data, string $format = null)
    {
        return $this->normalizer->supportsNormalization($data, $format);
    }

    public function setSerializer(SerializerInterface $serializer)
    {
        return $this->normalizer->setSerializer($serializer);
    }

}

As you can see, it’s currently doing nothing appart from decorating the original service.
What am I doing wrong ?