diff --git a/src/DI/Helpers/BuilderMan.php b/src/DI/Helpers/BuilderMan.php
index 2da59c3ac..380849fff 100644
--- a/src/DI/Helpers/BuilderMan.php
+++ b/src/DI/Helpers/BuilderMan.php
@@ -99,8 +99,10 @@ public function getServiceDefinitionsByTag(string $tag): array
 		$builder = $this->pass->getContainerBuilder();
 		$definitions = [];
 
+		/** @var array{name: string}|string $tagValue */
 		foreach ($builder->findByTag($tag) as $serviceName => $tagValue) {
-			$definitions[(string) $tagValue] = $builder->getDefinition($serviceName);
+			$name = is_array($tagValue) ? $tagValue['name'] : $tagValue;
+			$definitions[$name] = $builder->getDefinition($serviceName);
 		}
 
 		return $definitions;
@@ -114,8 +116,10 @@ public function getServiceNamesByTag(string $tag): array
 		$builder = $this->pass->getContainerBuilder();
 		$definitions = [];
 
+		/** @var array{name: string}|string $tagValue */
 		foreach ($builder->findByTag($tag) as $serviceName => $tagValue) {
-			$definitions[(string) $tagValue] = $serviceName;
+			$name = is_array($tagValue) ? $tagValue['name'] : $tagValue;
+			$definitions[$name] = $serviceName;
 		}
 
 		return $definitions;
diff --git a/src/DI/OrmExtension.php b/src/DI/OrmExtension.php
index 3d92fb8a3..e83b7f2cd 100644
--- a/src/DI/OrmExtension.php
+++ b/src/DI/OrmExtension.php
@@ -22,7 +22,7 @@
  * @property-read stdClass $config
  * @phpstan-type TManagerConfig object{
  *     entityManagerDecoratorClass: string|null,
- *     configurationClass: string,
+ *     configurationClass: class-string,
  *     lazyNativeObjects: bool|null,
  *     proxyDir: string|null,
  *     autoGenerateProxyClasses: int|bool|Statement,
@@ -86,7 +86,7 @@ public function __construct(
 	public function getConfigSchema(): Schema
 	{
 		$parameters = $this->getContainerBuilder()->parameters;
-		$proxyDir = isset($parameters['tempDir']) ? $parameters['tempDir'] . '/cache/doctrine/orm/proxies' : null;
+		$proxyDir = isset($parameters['tempDir']) && is_string($parameters['tempDir']) ? $parameters['tempDir'] . '/cache/doctrine/orm/proxies' : null;
 		$autoGenerateProxy = boolval($parameters['debugMode'] ?? true);
 
 		$expectService = Expect::anyOf(
diff --git a/src/ManagerRegistry.php b/src/ManagerRegistry.php
index bd612aad6..526238005 100644
--- a/src/ManagerRegistry.php
+++ b/src/ManagerRegistry.php
@@ -3,6 +3,8 @@
 namespace Nettrine\ORM;
 
 use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\UnitOfWork;
 use Doctrine\Persistence\AbstractManagerRegistry;
 use Doctrine\Persistence\ObjectManagerDecorator;
 use Doctrine\Persistence\Proxy;
@@ -36,19 +38,30 @@ public function __construct(
 		);
 	}
 
-	/**
-	 * @param ObjectManagerDecorator<EntityManager>|EntityManager $manager
-	 */
-	public static function reopen(ObjectManagerDecorator|EntityManager $manager): void
+	public static function reopen(EntityManagerInterface $manager): void
 	{
 		// @phpcs:disable
 		Binder::use($manager, function (): void {
 			if ($this instanceof EntityManager) {  // @phpstan-ignore-line
 				$this->closed = false; // @phpstan-ignore-line
+
+				$uow = $this->getUnitOfWork();
+				Binder::use($uow, function (): void {
+					if ($this instanceof UnitOfWork) { // @phpstan-ignore-line
+						$this->persisters = [];
+					}
+				});
 			} elseif ($this instanceof ObjectManagerDecorator) {
 				Binder::use($this->wrapped, function (): void { // @phpstan-ignore-line
 					if ($this instanceof EntityManager) { // @phpstan-ignore-line
 						$this->closed = false;
+
+						$uow = $this->getUnitOfWork();
+						Binder::use($uow, function (): void {
+							if ($this instanceof UnitOfWork) { // @phpstan-ignore-line
+								$this->persisters = [];
+							}
+						});
 					}
 				});
 			}
diff --git a/tests/Cases/DI/OrmExtension.schemaIgnoreClasses.phpt b/tests/Cases/DI/OrmExtension.schemaIgnoreClasses.phpt
index 9cf00bee2..639f8ac26 100644
--- a/tests/Cases/DI/OrmExtension.schemaIgnoreClasses.phpt
+++ b/tests/Cases/DI/OrmExtension.schemaIgnoreClasses.phpt
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php declare(strict_types = 1);
 
 use Contributte\Tester\Toolkit;
 use Contributte\Tester\Utils\ContainerBuilder;
diff --git a/tests/Cases/ManagerRegistry.phpt b/tests/Cases/ManagerRegistry.phpt
index ed3b3c45c..35ae19a55 100644
--- a/tests/Cases/ManagerRegistry.phpt
+++ b/tests/Cases/ManagerRegistry.phpt
@@ -4,7 +4,7 @@ use Contributte\Tester\Toolkit;
 use Contributte\Tester\Utils\ContainerBuilder;
 use Contributte\Tester\Utils\Neonkit;
 use Doctrine\DBAL\Connection;
-use Doctrine\ORM\EntityManager;
+use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\Persistence\ManagerRegistry;
 use Nette\DI\Compiler;
@@ -368,6 +368,7 @@ Toolkit::test(function (): void {
 			$compiler->addConfig([
 				'parameters' => [
 					'tempDir' => Tests::TEMP_PATH,
+					'fixturesDir' => Tests::FIXTURES_PATH,
 				],
 			]);
 			$compiler->addConfig(Neonkit::load(
@@ -379,6 +380,11 @@ Toolkit::test(function (): void {
 							password: test
 							user: test
 							path: ":memory:"
+						second:
+							driver: pdo_sqlite
+							password: test
+							user: test
+							path: ":memory:"
 				nettrine.orm:
 					managers:
 						default:
@@ -386,23 +392,67 @@ Toolkit::test(function (): void {
 							mapping:
 								App:
 									type: attributes
-									directories: [app/Database]
-									namespace: App\Database
+									directories: [%fixturesDir%/Entity]
+									namespace: Tests\Mocks\Entity
+						second:
+							connection: second
+							entityManagerDecoratorClass: Tests\Mocks\DummyEntityManagerDecorator
+							mapping:
+								App:
+									type: attributes
+									directories: [%fixturesDir%/Entity]
+									namespace: Tests\Mocks\Entity
 				NEON
 			));
 		})
 		->build();
 
-	/** @var EntityManager $em */
-	$em = $container->getByType(EntityManagerInterface::class);
+	/** @var ManagerRegistry $registry */
+	$registry = $container->getByType(ManagerRegistry::class);
+
+	foreach (['default', 'second'] as $managerName) {
+		/** @var EntityManagerInterface $em */
+		$em = $registry->getManager($managerName);
+		Assert::true($em->isOpen());
+
+		/** @var Connection $connection */
+		$connection = $registry->getConnection($managerName);
+
+		$connection->executeQuery('CREATE TABLE dummy_entity (id integer primary key autoincrement, username string unique not null)');
+
+		$persister1 = $em->getUnitOfWork()->getEntityPersister(DummyEntity::class);
 
-	Assert::true($em->isOpen());
-	$em->close();
-	Assert::false($em->isOpen());
+		$em->persist(new DummyEntity('test'));
+		$em->flush();
 
-	NettrineManagerRegistry::reopen($em);
+		Assert::count(0, $persister1->getInserts(), 'Persister should have no inserts, have ' . count($persister1->getInserts()));
 
-	Assert::true($em->isOpen());
+		// try to create a new entity with the same username - not unique
+		$em->persist(new DummyEntity('test'));
+		try {
+			$em->flush();
+		} catch (UniqueConstraintViolationException) {
+			Assert::false($em->isOpen());
+		}
+
+		// after failing queue there is cached last insert
+		Assert::count(1, $persister1->getInserts(), 'Persister should have 1 insert, have ' . count($persister1->getInserts()));
+
+		NettrineManagerRegistry::reopen($em);
+
+		Assert::true($em->isOpen());
+
+		$persister2 = $em->getUnitOfWork()->getEntityPersister(DummyEntity::class);
+
+		// check if the persister is different after reopening
+		Assert::notSame($persister1, $persister2);
+
+		$dummy2 = new DummyEntity('test2');
+		$em->persist($dummy2);
+		$em->flush();
+
+		Assert::count(2, $em->getRepository(DummyEntity::class)->findAll());
+	}
 });
 
 // Get repository for manager