diff --git a/core/modules/views/src/Plugin/views/filter/EntityReference.php b/core/modules/views/src/Plugin/views/filter/EntityReference.php
index 92a90b19e8..fb98612a1c 100644
--- a/core/modules/views/src/Plugin/views/filter/EntityReference.php
+++ b/core/modules/views/src/Plugin/views/filter/EntityReference.php
@@ -427,20 +427,23 @@ protected function getReferencedBundles() {
 
     // For each entity bundle check if this field is set and if yes collect
     // the configured target entity bundles.
-    $allTargetBundles = [];
+    $referenced_bundles = [];
     foreach ($bundles as $bundle) {
       // Get the field definition on the entity type bundle.
-      $fieldDefinitions = $this->entityFieldManager->getFieldDefinitions($target_type_id, $bundle);
-      $field = $fieldDefinitions[$field_name];
+      $field_definitions = $this->entityFieldManager->getFieldDefinitions($target_type_id, $bundle);
+      $field = $field_definitions[$field_name];
 
       // Get the configured reference-able bundles.
-      $targetBundles = $field->getSetting('handler_settings')['target_bundles'];
-      $targetBundles = array_keys($targetBundles);
-      $allTargetBundles = array_merge($allTargetBundles, $targetBundles);
+      $handler_settings = $field->getSetting('handler_settings');
+      if (array_key_exists('target_bundles', $handler_settings)) {
+        $target_bundles = $handler_settings['target_bundles'];
+        $target_bundles = array_keys($target_bundles);
+        $referenced_bundles = array_merge($referenced_bundles, $target_bundles);
+      }
     }
 
     // Remove duplicates and reset the array keying.
-    return array_values(array_unique($allTargetBundles));
+    return array_values(array_unique($referenced_bundles));
   }
 
 }