Patch to fix https://github.com/api-platform/api-platform/issues/1128

CollectionDataProvider.php

<?php

class CollectionDataProvider implements ContextAwareCollectionDataProviderInterface, RestrictedDataProviderInterface
{
    private $managerRegistry;
    private $collectionExtensions;
    private $requestStack;
    private $serializer;

    /**
     * @param QueryCollectionExtensionInterface[]|ContextAwareQueryCollectionExtensionInterface[] $collectionExtensions
     */
    public function __construct(
        ManagerRegistry $managerRegistry, /* iterable */ $collectionExtensions = [],
        RequestStack $requestStack,
        SerializerInterface $serializer
    ) {
        $this->managerRegistry = $managerRegistry;
        $this->collectionExtensions = $collectionExtensions;
        $this->requestStack = $requestStack;
        $this->serializer = $serializer;
    }

    public function supports(string $resourceClass, string $operationName = null, array $context = []): bool
    {
        return null !== $this->managerRegistry->getManagerForClass($resourceClass);
    }

    /**
     * {@inheritdoc}
     *
     * @throws RuntimeException
     */
    public function getCollection(string $resourceClass, string $operationName = null, array $context = [])
    {
        $manager = $this->managerRegistry->getManagerForClass($resourceClass);

        $repository = $manager->getRepository($resourceClass);
        if (!method_exists($repository, 'createQueryBuilder')) {
            throw new RuntimeException('The repository class must have a "createQueryBuilder" method.');
        }

        $alias = $this->supportFilter($context) ? $this->generateAlias($this->queryParametersToString()) : 'o';

        $queryBuilder = $repository->createQueryBuilder($alias);
        $queryNameGenerator = new QueryNameGenerator();
        foreach ($this->collectionExtensions as $extension) {
            $extension->applyToCollection($queryBuilder, $queryNameGenerator, $resourceClass, $operationName, $context);

            if ($extension instanceof QueryResultCollectionExtensionInterface && $extension->supportsResult($resourceClass,
                    $operationName, $context)) {
                return $extension->getResult($queryBuilder, $resourceClass, $operationName, $context);
            }
        }

        return $queryBuilder->getQuery()->getResult();
    }

    private function supportFilter(array $context = []): bool
    {
        return isset($context['filters']) || \is_array($context['filters']);
    }

    /**
     * Ensure that the query builder alias should not be in the $queryString.
     */
    private function generateAlias(string $queryString): string
    {
        $alias = 'o'.uniqid();

        while (false !== strpos($queryString, $alias)) {
            $alias = 'o'.uniqid();
        }

        return $alias;
    }

    private function queryParametersToString(): string
    {
        return $this->serializer->serialize($this->requestStack->getCurrentRequest()->query->all(), 'json');
    }
}

services.yaml

App\DataProvider\CollectionDataProvider:
    arguments:
        $collectionExtensions: !tagged api_platform.doctrine.orm.query_extension.collection