reverted:
--- b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php
+++ a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php
@@ -93,7 +93,7 @@
     if (isset($this->parent)) {
       $this->parent->onChange($this->name);
     }
+
-    
     // Unset processed properties that are affected by the change.
     foreach ($this->getPropertyDefinitions() as $property => $definition) {
       if (isset($definition['class']) && ($definition['class'] == '\Drupal\text\TextProcessed')) {