diff --cc core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
index c0feed2,c5c7d8f..0000000
--- a/core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
+++ b/core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
diff --git a/core/modules/datetime_range/src/DateTimeRangeTrait.php b/core/modules/datetime_range/src/DateTimeRangeTrait.php
index 2147da6..daa7d7b 100644
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php
@@ -99,13 +99,13 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         }
         else {
           $elements[$delta] = $this->buildDateWithIsoAttribute($start_date);
-        }
 
-        if (!empty($item->_attributes)) {
-          $elements[$delta]['#attributes'] += $item->_attributes;
-          // Unset field item attributes since they have been included in the
-          // formatter output and should not be rendered in the field template.
-          unset($item->_attributes);
+          if (!empty($item->_attributes)) {
+            $elements[$delta]['#attributes'] += $item->_attributes;
+            // Unset field item attributes since they have been included in the
+            // formatter output and should not be rendered in the field template.
+            unset($item->_attributes);
+          }
         }
       }
     }