diff --git a/.doctrine-project.json b/.doctrine-project.json
index e761549298c..0eeb48f5899 100644
--- a/.doctrine-project.json
+++ b/.doctrine-project.json
@@ -94,42 +94,6 @@
             "branchName": "2.10.x",
             "slug": "2.10",
             "maintained": false
-        },
-        {
-            "name": "2.9",
-            "branchName": "2.9.x",
-            "slug": "2.9",
-            "maintained": false
-        },
-        {
-            "name": "2.8",
-            "branchName": "2.8.x",
-            "slug": "2.8",
-            "maintained": false
-        },
-        {
-            "name": "2.7",
-            "branchName": "2.7",
-            "slug": "2.7",
-            "maintained": false
-        },
-        {
-            "name": "2.6",
-            "branchName": "2.6",
-            "slug": "2.6",
-            "maintained": false
-        },
-        {
-            "name": "2.5",
-            "branchName": "2.5",
-            "slug": "2.5",
-            "maintained": false
-        },
-        {
-            "name": "2.4",
-            "branchName": "2.4",
-            "slug": "2.4",
-            "maintained": false
         }
     ]
 }
diff --git a/composer.json b/composer.json
index 1a42c2c3ab8..639485f3cc8 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         "doctrine/persistence": "^3.3.1",
         "psr/cache": "^1 || ^2 || ^3",
         "symfony/console": "^5.4 || ^6.0 || ^7.0",
-        "symfony/var-exporter": "~6.2.13 || ^6.3.2 || ^7.0"
+        "symfony/var-exporter": "^6.3.9 || ^7.0"
     },
     "require-dev": {
         "doctrine/coding-standard": "^12.0",
diff --git a/docs/.gitignore b/docs/.gitignore
deleted file mode 100644
index 59cd005a9a4..00000000000
--- a/docs/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-en/_exts/configurationblock.pyc
-build
-en/_build
-.idea
diff --git a/docs/.gitmodules b/docs/.gitmodules
deleted file mode 100644
index e38d44b0adf..00000000000
--- a/docs/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "en/_theme"]
-	path = en/_theme
-	url = https://github.com/doctrine/doctrine-sphinx-theme.git
diff --git a/docs/en/reference/basic-mapping.rst b/docs/en/reference/basic-mapping.rst
index 49aacf93046..0c37867cfff 100644
--- a/docs/en/reference/basic-mapping.rst
+++ b/docs/en/reference/basic-mapping.rst
@@ -228,50 +228,12 @@ and a custom ``Doctrine\ORM\Mapping\TypedFieldMapper`` implementation.
 Doctrine Mapping Types
 ----------------------
 
-The ``type`` option used in the ``@Column`` accepts any of the existing
-Doctrine types or even your own custom types. A Doctrine type defines
+The ``type`` option used in the ``@Column`` accepts any of the
+`existing Doctrine DBAL types <https://docs.doctrine-project.org/projects/doctrine-dbal/en/stable/reference/types.html#reference>`_
+or :doc:`your own custom mapping types
+<../cookbook/custom-mapping-types>`. A Doctrine type defines
 the conversion between PHP and SQL types, independent from the database vendor
-you are using. All Mapping Types that ship with Doctrine are fully portable
-between the supported database systems.
-
-As an example, the Doctrine Mapping Type ``string`` defines the
-mapping from a PHP string to a SQL VARCHAR (or VARCHAR2 etc.
-depending on the RDBMS brand). Here is a quick overview of the
-built-in mapping types:
-
--  ``string``: Type that maps a SQL VARCHAR to a PHP string.
--  ``integer``: Type that maps a SQL INT to a PHP integer.
--  ``smallint``: Type that maps a database SMALLINT to a PHP
-   integer.
--  ``bigint``: Type that maps a database BIGINT to a PHP string.
--  ``boolean``: Type that maps a SQL boolean or equivalent (TINYINT) to a PHP boolean.
--  ``decimal``: Type that maps a SQL DECIMAL to a PHP string.
--  ``date``: Type that maps a SQL DATETIME to a PHP DateTime
-   object.
--  ``time``: Type that maps a SQL TIME to a PHP DateTime object.
--  ``datetime``: Type that maps a SQL DATETIME/TIMESTAMP to a PHP
-   DateTime object.
--  ``datetimetz``: Type that maps a SQL DATETIME/TIMESTAMP to a PHP
-   DateTime object with timezone.
--  ``text``: Type that maps a SQL CLOB to a PHP string.
--  ``object``: Type that maps a SQL CLOB to a PHP object using
-   ``serialize()`` and ``unserialize()``
--  ``array``: Type that maps a SQL CLOB to a PHP array using
-   ``serialize()`` and ``unserialize()``
--  ``simple_array``: Type that maps a SQL CLOB to a PHP array using
-   ``implode()`` and ``explode()``, with a comma as delimiter. *IMPORTANT*
-   Only use this type if you are sure that your values cannot contain a ",".
--  ``json_array``: Type that maps a SQL CLOB to a PHP array using
-   ``json_encode()`` and ``json_decode()``
--  ``float``: Type that maps a SQL Float (Double Precision) to a
-   PHP double. *IMPORTANT*: Works only with locale settings that use
-   decimal points as separator.
--  ``guid``: Type that maps a database GUID/UUID to a PHP string. Defaults to
-   varchar but uses a specific type if the platform supports it.
--  ``blob``: Type that maps a SQL BLOB to a PHP resource stream
-
-A cookbook article shows how to define :doc:`your own custom mapping types
-<../cookbook/custom-mapping-types>`.
+you are using.
 
 .. note::
 
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index 668d517ef55..4faaf8ce91d 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -760,13 +760,8 @@
       <code><![CDATA[$autoGenerate > 4]]></code>
     </TypeDoesNotContainType>
     <UndefinedMethod>
-      <code><![CDATA[self::createLazyGhost(static function (InternalProxy $object) use ($initializer, &$proxy): void {
-                $initializer($object, $proxy);
-            }, $skippedProperties)]]></code>
+      <code><![CDATA[self::createLazyGhost($initializer, $skippedProperties)]]></code>
     </UndefinedMethod>
-    <UndefinedVariable>
-      <code><![CDATA[$proxy]]></code>
-    </UndefinedVariable>
     <UnresolvableInclude>
       <code><![CDATA[require $fileName]]></code>
     </UnresolvableInclude>
diff --git a/src/Proxy/ProxyFactory.php b/src/Proxy/ProxyFactory.php
index f784cefa651..6184fa7811c 100644
--- a/src/Proxy/ProxyFactory.php
+++ b/src/Proxy/ProxyFactory.php
@@ -216,11 +216,11 @@ protected function skipClass(ClassMetadata $metadata): bool
      */
     private function createLazyInitializer(ClassMetadata $classMetadata, EntityPersister $entityPersister, IdentifierFlattener $identifierFlattener): Closure
     {
-        return static function (InternalProxy $proxy, InternalProxy $original) use ($entityPersister, $classMetadata, $identifierFlattener): void {
-            $identifier = $classMetadata->getIdentifierValues($original);
-            $entity     = $entityPersister->loadById($identifier, $original);
+        return static function (InternalProxy $proxy) use ($entityPersister, $classMetadata, $identifierFlattener): void {
+            $identifier = $classMetadata->getIdentifierValues($proxy);
+            $original   = $entityPersister->loadById($identifier);
 
-            if ($entity === null) {
+            if ($original === null) {
                 throw EntityNotFoundException::fromClassNameAndIdentifier(
                     $classMetadata->getName(),
                     $identifierFlattener->flattenIdentifier($classMetadata, $identifier),
@@ -234,11 +234,11 @@ private function createLazyInitializer(ClassMetadata $classMetadata, EntityPersi
             $class = $entityPersister->getClassMetadata();
 
             foreach ($class->getReflectionProperties() as $property) {
-                if (! $property || ! $class->hasField($property->name) && ! $class->hasAssociation($property->name)) {
+                if (! $property || ! $class->hasField($property->getName()) && ! $class->hasAssociation($property->getName())) {
                     continue;
                 }
 
-                $property->setValue($proxy, $property->getValue($entity));
+                $property->setValue($proxy, $property->getValue($original));
             }
         };
     }
@@ -283,9 +283,7 @@ private function getProxyFactory(string $className): Closure
         $identifierFields = array_intersect_key($class->getReflectionProperties(), $identifiers);
 
         $proxyFactory = Closure::bind(static function (array $identifier) use ($initializer, $skippedProperties, $identifierFields, $className): InternalProxy {
-            $proxy = self::createLazyGhost(static function (InternalProxy $object) use ($initializer, &$proxy): void {
-                $initializer($object, $proxy);
-            }, $skippedProperties);
+            $proxy = self::createLazyGhost($initializer, $skippedProperties);
 
             foreach ($identifierFields as $idField => $reflector) {
                 if (! isset($identifier[$idField])) {
diff --git a/src/UnitOfWork.php b/src/UnitOfWork.php
index 018c1e788fb..b07bf8aa518 100644
--- a/src/UnitOfWork.php
+++ b/src/UnitOfWork.php
@@ -2581,9 +2581,9 @@ public function createEntity(string $className, array $data, array &$hints = [])
 
                     if ($hints['fetchMode'][$class->name][$field] === ClassMetadata::FETCH_EAGER) {
                         $isIteration = isset($hints[Query::HINT_INTERNAL_ITERATION]) && $hints[Query::HINT_INTERNAL_ITERATION];
-                        if (! $isIteration && $assoc->isOneToMany()) {
+                        if (! $isIteration && $assoc->isOneToMany() && ! $targetClass->isIdentifierComposite && ! $assoc->isIndexed()) {
                             $this->scheduleCollectionForBatchLoading($pColl, $class);
-                        } elseif (($isIteration && $assoc->isOneToMany()) || $assoc->isManyToMany()) {
+                        } else {
                             $this->loadCollection($pColl);
                             $pColl->takeSnapshot();
                         }
diff --git a/tests/Performance/Mock/NonLoadingPersister.php b/tests/Performance/Mock/NonLoadingPersister.php
index 7058092bf68..bf487978c9f 100644
--- a/tests/Performance/Mock/NonLoadingPersister.php
+++ b/tests/Performance/Mock/NonLoadingPersister.php
@@ -4,8 +4,7 @@
 
 namespace Doctrine\Performance\Mock;
 
-use Doctrine\DBAL\LockMode;
-use Doctrine\ORM\Mapping\AssociationMapping;
+use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Persisters\Entity\BasicEntityPersister;
 
 /**
@@ -13,22 +12,14 @@
  */
 class NonLoadingPersister extends BasicEntityPersister
 {
-    public function __construct()
-    {
+    public function __construct(
+        ClassMetadata $class,
+    ) {
+        $this->class = $class;
     }
 
-    /**
-     * {@inheritDoc}
-     */
-    public function load(
-        array $criteria,
-        object|null $entity = null,
-        AssociationMapping|null $assoc = null,
-        array $hints = [],
-        LockMode|int|null $lockMode = null,
-        int|null $limit = null,
-        array|null $orderBy = null,
-    ): object|null {
-        return $entity;
+    public function loadById(array $identifier, object|null $entity = null): object|null
+    {
+        return $entity ?? new ($this->class->name)();
     }
 }
diff --git a/tests/Performance/Mock/NonProxyLoadingEntityManager.php b/tests/Performance/Mock/NonProxyLoadingEntityManager.php
index e60e476c408..20f233e0089 100644
--- a/tests/Performance/Mock/NonProxyLoadingEntityManager.php
+++ b/tests/Performance/Mock/NonProxyLoadingEntityManager.php
@@ -57,7 +57,7 @@ public function getClassMetadata(string $className): ClassMetadata
 
     public function getUnitOfWork(): UnitOfWork
     {
-        return new NonProxyLoadingUnitOfWork();
+        return new NonProxyLoadingUnitOfWork($this);
     }
 
     public function getCache(): Cache|null
diff --git a/tests/Performance/Mock/NonProxyLoadingUnitOfWork.php b/tests/Performance/Mock/NonProxyLoadingUnitOfWork.php
index d9ca05c6879..68884a3f232 100644
--- a/tests/Performance/Mock/NonProxyLoadingUnitOfWork.php
+++ b/tests/Performance/Mock/NonProxyLoadingUnitOfWork.php
@@ -4,6 +4,7 @@
 
 namespace Doctrine\Performance\Mock;
 
+use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\UnitOfWork;
 
 /**
@@ -11,15 +12,17 @@
  */
 class NonProxyLoadingUnitOfWork extends UnitOfWork
 {
-    private NonLoadingPersister $entityPersister;
+    /** @var array<class-string, NonLoadingPersister> */
+    private array $entityPersisters = [];
 
-    public function __construct()
-    {
-        $this->entityPersister = new NonLoadingPersister();
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+    ) {
     }
 
     public function getEntityPersister(string $entityName): NonLoadingPersister
     {
-        return $this->entityPersister;
+        return $this->entityPersisters[$entityName]
+            ??= new NonLoadingPersister($this->entityManager->getClassMetadata($entityName));
     }
 }
diff --git a/tests/Tests/Models/EagerFetchedCompositeOneToMany/RootEntity.php b/tests/Tests/Models/EagerFetchedCompositeOneToMany/RootEntity.php
new file mode 100644
index 00000000000..d369be822d9
--- /dev/null
+++ b/tests/Tests/Models/EagerFetchedCompositeOneToMany/RootEntity.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\Models\EagerFetchedCompositeOneToMany;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'eager_composite_join_root')]
+class RootEntity
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'integer', nullable: false)]
+    private int|null $id = null;
+
+    #[ORM\Id]
+    #[ORM\Column(type: 'string', nullable: false, name: 'other_key', length: 42)]
+    private string $otherKey;
+
+    /** @var Collection<int, SecondLevel> */
+    #[ORM\OneToMany(mappedBy: 'root', targetEntity: SecondLevel::class, fetch: 'EAGER')]
+    private Collection $secondLevel;
+
+    public function __construct(int $id, string $other)
+    {
+        $this->otherKey    = $other;
+        $this->secondLevel = new ArrayCollection();
+        $this->id          = $id;
+    }
+
+    public function getId(): int|null
+    {
+        return $this->id;
+    }
+
+    public function getOtherKey(): string
+    {
+        return $this->otherKey;
+    }
+}
diff --git a/tests/Tests/Models/EagerFetchedCompositeOneToMany/SecondLevel.php b/tests/Tests/Models/EagerFetchedCompositeOneToMany/SecondLevel.php
new file mode 100644
index 00000000000..0608dcffba4
--- /dev/null
+++ b/tests/Tests/Models/EagerFetchedCompositeOneToMany/SecondLevel.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\Models\EagerFetchedCompositeOneToMany;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'eager_composite_join_second_level')]
+#[ORM\Index(name: 'root_other_key_idx', columns: ['root_other_key', 'root_id'])]
+class SecondLevel
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'integer', nullable: false)]
+    private int|null $upperId;
+
+    #[ORM\Id]
+    #[ORM\Column(type: 'string', nullable: false, name: 'other_key')]
+    private string $otherKey;
+
+    #[ORM\ManyToOne(targetEntity: RootEntity::class, inversedBy: 'secondLevel')]
+    #[ORM\JoinColumn(name: 'root_id', referencedColumnName: 'id')]
+    #[ORM\JoinColumn(name: 'root_other_key', referencedColumnName: 'other_key')]
+    private RootEntity $root;
+
+    public function __construct(RootEntity $upper)
+    {
+        $this->upperId  = $upper->getId();
+        $this->otherKey = $upper->getOtherKey();
+        $this->root     = $upper;
+    }
+
+    public function getId(): int|null
+    {
+        return $this->id;
+    }
+}
diff --git a/tests/Tests/ORM/Functional/EagerFetchOneToManyWithCompositeKeyTest.php b/tests/Tests/ORM/Functional/EagerFetchOneToManyWithCompositeKeyTest.php
new file mode 100644
index 00000000000..82b9d0b8acb
--- /dev/null
+++ b/tests/Tests/ORM/Functional/EagerFetchOneToManyWithCompositeKeyTest.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional;
+
+use Doctrine\Tests\Models\EagerFetchedCompositeOneToMany\RootEntity;
+use Doctrine\Tests\Models\EagerFetchedCompositeOneToMany\SecondLevel;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+final class EagerFetchOneToManyWithCompositeKeyTest extends OrmFunctionalTestCase
+{
+    /** @ticket 11154 */
+    public function testItDoesNotThrowAnExceptionWhenTriggeringALoad(): void
+    {
+        $this->setUpEntitySchema([RootEntity::class, SecondLevel::class]);
+
+        $a1 = new RootEntity(1, 'A');
+
+        $this->_em->persist($a1);
+        $this->_em->flush();
+
+        $this->_em->clear();
+
+        self::assertCount(1, $this->_em->getRepository(RootEntity::class)->findAll());
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProduct.php b/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProduct.php
new file mode 100644
index 00000000000..0089d9a26aa
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProduct.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11149;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table('gh11149_eager_product')]
+class EagerProduct
+{
+    #[ORM\Id]
+    #[ORM\Column]
+    public int $id;
+
+    /** @var Collection<string, EagerProductTranslation> */
+    #[ORM\OneToMany(
+        targetEntity: EagerProductTranslation::class,
+        mappedBy: 'product',
+        fetch: 'EAGER',
+        indexBy: 'locale_code',
+    )]
+    public Collection $translations;
+
+    public function __construct(int $id)
+    {
+        $this->id           = $id;
+        $this->translations = new ArrayCollection();
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProductTranslation.php b/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProductTranslation.php
new file mode 100644
index 00000000000..8027010ca86
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11149/EagerProductTranslation.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11149;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table('gh11149_eager_product_translation')]
+class EagerProductTranslation
+{
+    #[ORM\Id]
+    #[ORM\Column]
+    private int $id;
+
+    #[ORM\ManyToOne(inversedBy: 'translations')]
+    #[ORM\JoinColumn(nullable: false)]
+    public EagerProduct $product;
+
+    #[ORM\ManyToOne]
+    #[ORM\JoinColumn(name: 'locale_code', referencedColumnName: 'code', nullable: false)]
+    public Locale $locale;
+
+    public function __construct(int $id, EagerProduct $product, Locale $locale)
+    {
+        $this->id      = $id;
+        $this->product = $product;
+        $this->locale  = $locale;
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11149/GH11149Test.php b/tests/Tests/ORM/Functional/Ticket/GH11149/GH11149Test.php
new file mode 100644
index 00000000000..28bab541b90
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11149/GH11149Test.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11149;
+
+use Doctrine\ORM\PersistentCollection;
+use Doctrine\Persistence\Proxy;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+class GH11149Test extends OrmFunctionalTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->setUpEntitySchema([
+            Locale::class,
+            EagerProduct::class,
+            EagerProductTranslation::class,
+        ]);
+    }
+
+    public function testFetchEagerModeWithIndexBy(): void
+    {
+        // Load entities into database
+        $this->_em->persist($product = new EagerProduct(11149));
+        $this->_em->persist($locale = new Locale('fr_FR'));
+        $this->_em->persist(new EagerProductTranslation(11149, $product, $locale));
+        $this->_em->flush();
+        $this->_em->clear();
+
+        // Fetch entity from database
+        $product = $this->_em->find(EagerProduct::class, 11149);
+
+        // Assert associated entity is loaded eagerly
+        static::assertInstanceOf(EagerProduct::class, $product);
+        static::assertInstanceOf(PersistentCollection::class, $product->translations);
+        static::assertTrue($product->translations->isInitialized());
+        static::assertCount(1, $product->translations);
+
+        // Assert associated entity is indexed by given property
+        $translation = $product->translations->get('fr_FR');
+        static::assertInstanceOf(EagerProductTranslation::class, $translation);
+        static::assertNotInstanceOf(Proxy::class, $translation);
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11149/Locale.php b/tests/Tests/ORM/Functional/Ticket/GH11149/Locale.php
new file mode 100644
index 00000000000..75a4f583c83
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11149/Locale.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11149;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table('gh11149_locale')]
+class Locale
+{
+    #[ORM\Id]
+    #[ORM\Column(length: 5)]
+    public string $code;
+
+    public function __construct(string $code)
+    {
+        $this->code = $code;
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCart.php b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCart.php
new file mode 100644
index 00000000000..032171aac52
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCart.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11386;
+
+use Doctrine\ORM\Mapping\Column;
+use Doctrine\ORM\Mapping\Entity;
+use Doctrine\ORM\Mapping\GeneratedValue;
+use Doctrine\ORM\Mapping\Id;
+use Doctrine\ORM\Mapping\OneToOne;
+
+#[Entity]
+class GH11386EntityCart
+{
+    #[Id]
+    #[GeneratedValue]
+    #[Column]
+    private int|null $id = null;
+
+    #[Column]
+    private int|null $amount = null;
+
+    #[OneToOne(inversedBy: 'cart', cascade: ['persist', 'remove'], orphanRemoval: true)]
+    private GH11386EntityCustomer|null $customer = null;
+
+    public function getId(): int|null
+    {
+        return $this->id;
+    }
+
+    public function getAmount(): int|null
+    {
+        return $this->amount;
+    }
+
+    public function setAmount(int $amount): static
+    {
+        $this->amount = $amount;
+
+        return $this;
+    }
+
+    public function getCustomer(): GH11386EntityCustomer|null
+    {
+        return $this->customer;
+    }
+
+    public function setCustomer(GH11386EntityCustomer|null $customer): self
+    {
+        $this->customer = $customer;
+
+        return $this;
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCustomer.php b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCustomer.php
new file mode 100644
index 00000000000..3290a6f99bf
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EntityCustomer.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11386;
+
+use Doctrine\ORM\Mapping\Column;
+use Doctrine\ORM\Mapping\Entity;
+use Doctrine\ORM\Mapping\GeneratedValue;
+use Doctrine\ORM\Mapping\Id;
+use Doctrine\ORM\Mapping\OneToOne;
+
+#[Entity]
+class GH11386EntityCustomer
+{
+    #[Id]
+    #[GeneratedValue]
+    #[Column]
+    private int|null $id = null;
+
+    #[Column]
+    private string|null $name = null;
+
+    #[Column(type: 'smallint', nullable: true, enumType: GH11386EnumType::class, options: ['unsigned' => true])]
+    private GH11386EnumType|null $type = null;
+
+    #[OneToOne(mappedBy: 'customer')]
+    private GH11386EntityCart|null $cart = null;
+
+    public function getId(): int|null
+    {
+        return $this->id;
+    }
+
+    public function getName(): string|null
+    {
+        return $this->name;
+    }
+
+    public function setName(string $name): static
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    public function getType(): GH11386EnumType|null
+    {
+        return $this->type;
+    }
+
+    public function setType(GH11386EnumType $type): static
+    {
+        $this->type = $type;
+
+        return $this;
+    }
+
+    public function getCart(): GH11386EntityCart|null
+    {
+        return $this->cart;
+    }
+
+    public function setCart(GH11386EntityCart|null $cart): self
+    {
+        // unset the owning side of the relation if necessary
+        if ($cart === null && $this->cart !== null) {
+            $this->cart->setCustomer(null);
+        }
+
+        // set the owning side of the relation if necessary
+        if ($cart !== null && $cart->getCustomer() !== $this) {
+            $cart->setCustomer($this);
+        }
+
+        $this->cart = $cart;
+
+        return $this;
+    }
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EnumType.php b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EnumType.php
new file mode 100644
index 00000000000..c07da865b95
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386EnumType.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11386;
+
+enum GH11386EnumType: int
+{
+    case MALE   = 1;
+    case FEMALE = 2;
+}
diff --git a/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386Test.php b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386Test.php
new file mode 100644
index 00000000000..b1ceef16cbc
--- /dev/null
+++ b/tests/Tests/ORM/Functional/Ticket/GH11386/GH11386Test.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket\GH11386;
+
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+final class GH11386Test extends OrmFunctionalTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->createSchemaForModels(
+            GH11386EntityCart::class,
+            GH11386EntityCustomer::class,
+        );
+    }
+
+    public function testInitializeClonedProxy(): void
+    {
+        $cart = new GH11386EntityCart();
+        $cart->setAmount(1000);
+
+        $customer = new GH11386EntityCustomer();
+        $customer->setName('John Doe')
+            ->setType(GH11386EnumType::MALE)
+            ->setCart($cart);
+
+        $this->_em->persist($cart);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $cart     = $this->_em->find(GH11386EntityCart::class, 1);
+        $customer = clone $cart->getCustomer();
+        self::assertEquals('John Doe', $customer->getName());
+    }
+}
diff --git a/tests/Tests/ORM/Proxy/ProxyFactoryTest.php b/tests/Tests/ORM/Proxy/ProxyFactoryTest.php
index 7359c493a5f..31cb9cc001f 100644
--- a/tests/Tests/ORM/Proxy/ProxyFactoryTest.php
+++ b/tests/Tests/ORM/Proxy/ProxyFactoryTest.php
@@ -62,9 +62,8 @@ protected function setUp(): void
     public function testReferenceProxyDelegatesLoadingToThePersister(): void
     {
         $identifier = ['id' => 42];
-        $proxyClass = 'Proxies\__CG__\Doctrine\Tests\Models\ECommerce\ECommerceFeature';
         $persister  = $this->getMockBuilder(BasicEntityPersister::class)
-            ->onlyMethods(['load'])
+            ->onlyMethods(['loadById'])
             ->disableOriginalConstructor()
             ->getMock();
 
@@ -74,8 +73,8 @@ public function testReferenceProxyDelegatesLoadingToThePersister(): void
 
         $persister
             ->expects(self::atLeastOnce())
-            ->method('load')
-            ->with(self::equalTo($identifier), self::isInstanceOf($proxyClass))
+            ->method('loadById')
+            ->with(self::equalTo($identifier))
             ->will(self::returnValue($proxy));
 
         $proxy->getDescription();