Guy Elsmore-Paddock
--- a/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
+++ b/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
    /** @var \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository */
    $entity_repository = \Drupal::service('entity.repository');
+    $labels_data = NULL;

-    $entity_labels = [];
-    foreach ($entities as $entity) {
-      // Set the entity in the correct language for display.
-      $entity = $entity_repository->getTranslationFromContext($entity);
+    // Check to see if the Selection handler can supply entity labels.
+    if ($element != NULL) {
+      $options = $element['#selection_settings'] + [
+          'target_type' => $element['#target_type'],
+          'handler' => $element['#selection_handler'],
+        ];
+      /** @var /Drupal\Core\Entity\EntityReferenceSelection\SelectionInterface $handler */
+      $handler = \Drupal::service('plugin.manager.entity_reference_selection')
--- a/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
+++ b/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
+    }

-      // Use the special view label, since some entities allow the label to be
-      // viewed, even if the entity is not allowed to be viewed.
-      $label = ($entity->access('view label')) ? $entity->label() : t('- Restricted access -');
+    if ($labels_data === NULL) {
+      $labels_data = [];
+      // Fallback to legacy/default behavior for handlers that don't expose
+      // the new interface for getting autocomplete labels.
+      foreach ($entities as $entity) {
+        // Set the entity in the correct language for display.
+        $entity = $entity_repository->getTranslationFromContext($entity);
+
+        // Use the special view label, since some entities allow the label to be
+        // viewed, even if the entity is not allowed to be viewed.
+        $label = ($entity->access('view label')) ? $entity->label() : t('- Restricted access -');
--- a/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
+++ b/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
-      // viewed, even if the entity is not allowed to be viewed.
-      $label = ($entity->access('view label')) ? $entity->label() : t('- Restricted access -');
+    if ($labels_data === NULL) {
+      $labels_data = [];
+      // Fallback to legacy/default behavior for handlers that don't expose
+      // the new interface for getting autocomplete labels.
+      foreach ($entities as $entity) {
+        // Set the entity in the correct language for display.
+        $entity = $entity_repository->getTranslationFromContext($entity);
+
+        // Use the special view label, since some entities allow the label to be
+        // viewed, even if the entity is not allowed to be viewed.
+        $label = ($entity->access('view label')) ? $entity->label() : t('- Restricted access -');
+
+        // Take into account "autocreated" entities.
+        if ($entity->isNew()) {