diff --git a/sources/content/src/Controller/ContentTranslationPreviewController.php b/sources/content/src/Controller/ContentTranslationPreviewController.php
index fe5ab964..0c194a67 100644
--- a/sources/content/src/Controller/ContentTranslationPreviewController.php
+++ b/sources/content/src/Controller/ContentTranslationPreviewController.php
@@ -122,7 +122,8 @@ class ContentTranslationPreviewController extends ControllerBase {
 
     $translation = $entity->getTranslation($target_langcode);
 
-    foreach ($data as $name => $field_data) {
+    foreach (Element::children($data) as $name) {
+      $field_data = $data[$name];
       foreach (Element::children($field_data) as $delta) {
         $field_item = $field_data[$delta];
         foreach (Element::children($field_item) as $property) {
diff --git a/sources/content/src/DefaultFieldProcessor.php b/sources/content/src/DefaultFieldProcessor.php
index dc5d94a3..c9962f8d 100644
--- a/sources/content/src/DefaultFieldProcessor.php
+++ b/sources/content/src/DefaultFieldProcessor.php
@@ -87,13 +87,11 @@ class DefaultFieldProcessor implements FieldProcessorInterface {
         // If there is translation data for the field property, save it.
         if (isset($property_data['#translation']['#text']) && $property_data['#translate']) {
 
-          if (!$field->offsetExists($delta)) {
-            $name = $field->getFieldDefinition()->getName();
-            $translation = $field->getEntity();
-            throw new \Exception("Offset $delta on field '$name' does not exist on entity " . $translation->getEntityTypeId() . '/' . $translation->id());
+          // Only set the value if the offset currently exists on the entity.
+          // @todo: Should this create a new item instead?
+          if ($field->offsetExists($delta)) {
+            $field->offsetGet($delta)->set($property, $property_data['#translation']['#text']);
           }
-
-          $field->offsetGet($delta)->set($property, $property_data['#translation']['#text']);
         }
       }
     }
diff --git a/sources/content/tests/src/Kernel/ContentEntitySourceUnitTest.php b/sources/content/tests/src/Kernel/ContentEntitySourceUnitTest.php
index 278f37ca..15309f46 100644
--- a/sources/content/tests/src/Kernel/ContentEntitySourceUnitTest.php
+++ b/sources/content/tests/src/Kernel/ContentEntitySourceUnitTest.php
@@ -68,7 +68,7 @@ class ContentEntitySourceUnitTest extends EntityKernelTestBase {
 
     // Make the test field translatable.
     $field_storage = FieldStorageConfig::loadByName('entity_test_mul', 'field_test_text');
-    $field_storage->setCardinality(3);
+    $field_storage->setCardinality(4);
     $field_storage->save();
     $field = FieldConfig::loadByName('entity_test_mul', 'entity_test_mul', 'field_test_text');
     $field->setTranslatable(TRUE);
@@ -128,35 +128,41 @@ class ContentEntitySourceUnitTest extends EntityKernelTestBase {
       'langcode' => 'en',
       'user_id' => 1,
     );
-    $entity_test = entity_create($this->entityTypeId, $values);
-    $translation = $entity_test->getTranslation('en');
-    $translation->name->value = $this->randomMachineName();
-    $translation->field_test_text->appendItem([
+    $entity_test = EntityTestMul::create($values);
+    $entity_test->name->value = $this->randomMachineName();
+    $entity_test->field_test_text->appendItem([
       'value' => $this->randomMachineName(),
       'format' => 'text_plain',
     ]);
-    $translation->field_test_text->appendItem([
+    $entity_test->field_test_text->appendItem([
       'value' => $this->randomMachineName(),
       'format' => 'text_plain',
     ]);
-    $translation->field_test_text->appendItem([
+    $entity_test->field_test_text->appendItem([
       'value' => $this->randomMachineName(),
       'format' => 'unallowed_format',
     ]);
 
+    // Add another item that will be removed again.
+    $entity_test->field_test_text->appendItem([
+      'value' => $this->randomMachineName(),
+      'format' => 'text_plain',
+    ]);
+
     $values = array(
       'target_id' => $this->image->id(),
       'alt' => $this->randomMachineName(),
       'title' => $this->randomMachineName(),
     );
-    $translation->image_test->appendItem($values);
-    $entity_test->save();
+    $entity_test->image_test->appendItem($values);
 
-    $translation->ignored_field->appendItem([
+    $entity_test->ignored_field->appendItem([
       'value' => 'This field should not be translated.',
       'format' => 'text_plain',
     ]);
 
+    $entity_test->save();
+
     $job = tmgmt_job_create('en', 'de');
     $job->translator = 'test_translator';
     $job->save();
@@ -204,6 +210,15 @@ class ContentEntitySourceUnitTest extends EntityKernelTestBase {
     $this->assertEqual($data['field_test_text'][2]['format']['#translate'], FALSE);
     $this->assertFalse(isset($data['field_test_text'][2]['processed']));
 
+    $this->assertEqual($data['field_test_text'][3]['#label'], 'Delta #3');
+    $this->assertFalse(isset($data['field_test_text'][3]['value']['#label']));
+    $this->assertEqual($data['field_test_text'][3]['value']['#text'], $entity_test->field_test_text[3]->value);
+    $this->assertEqual($data['field_test_text'][3]['value']['#translate'], TRUE);
+    $this->assertFalse(isset($data['field_test_text'][3]['format']['#label']));
+    $this->assertEqual($data['field_test_text'][3]['format']['#text'], $entity_test->field_test_text[3]->format);
+    $this->assertEqual($data['field_test_text'][3]['format']['#translate'], FALSE);
+    $this->assertFalse(isset($data['field_test_text'][3]['processed']));
+
     // Test the image field.
     $image_item = $data['image_test'][0];
     $this->assertEqual($data['image_test']['#label'], $this->image_label);
@@ -223,6 +238,10 @@ class ContentEntitySourceUnitTest extends EntityKernelTestBase {
 
     // Now request a translation and save it back.
     $job->requestTranslation();
+
+    $entity_test->get('field_test_text')->offsetUnset(3);
+    $entity_test->save();
+
     $items = $job->getItems();
     $item = reset($items);
     $item->acceptTranslation();
@@ -235,6 +254,10 @@ class ContentEntitySourceUnitTest extends EntityKernelTestBase {
     $this->assertEqual($translation->name->value, $data['name'][0]['value']['#translation']['#text']);
     $this->assertEqual($translation->field_test_text[0]->value, $data['field_test_text'][0]['value']['#translation']['#text']);
     $this->assertEqual($translation->field_test_text[1]->value, $data['field_test_text'][1]['value']['#translation']['#text']);
+    $this->assertEqual($translation->field_test_text[2]->value, $data['field_test_text'][2]['value']['#text']);
+
+    // Ensure no item was created for the removed delta.
+    $this->assertFalse(isset($translation->field_test_text[3]));
   }
 
   /**