diff --git a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
index dc63033..0d89b21 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
@@ -255,10 +255,25 @@ public function loadRevision($revision_id) {
   public function loadMultipleRevisions(array $revision_ids) {
     $revisions = $this->doLoadRevisionFieldItems($revision_ids);
 
-    // The hooks are invoked keyed by entity ID so we have invoke them for each
-    // revision.
+    // The hooks are executed with an array of entities keyed by the entity ID.
+    // As we could load multiple revisions for the same entity ID at once we
+    // have to build groups of entities where the same entity ID is present only
+    // once.
+    $entity_groups = [];
     foreach ($revisions as $revision) {
-      $entities = [$revision->id() => $revision];
+      $id = $revision->id();
+      foreach ($entity_groups as &$entity_group) {
+        if (!isset($entity_group[$id])) {
+          $entity_group[$id] = $revision;
+          continue 2;
+        }
+      }
+      // If no suitable group has been found then create a new one.
+      $entity_groups[] = [$id => $revision];
+    }
+
+    // Invoke the entity hooks for each group.
+    foreach ($entity_groups as $entities) {
       $this->invokeStorageLoadHook($entities);
       $this->postLoad($entities);
     }