default title format and first save of nested elements

CHANGELOG.md

@@ -2,10 +2,12 @@
 
 ## Unreleased
 
+- Added `craft\base\ElementInterface::afterAssignedId()`.
 - Fixed an error that occurred when executing the `users/remove-2fa` command non-interactively, if `--method` wasn’t provided. ([#18724](https://github.com/craftcms/cms/issues/18724))
 - Fixed a bug where Link fields weren’t getting updated when the “Replace relations” element deletion option was chosen. ([#18992](https://github.com/craftcms/cms/issues/18992))
 - Fixed a bug where it wasn’t always possible to select new categories or entries in relation fields. ([#18976](https://github.com/craftcms/cms/issues/18976))
 - Fixed a bug where Checkboxes and Multi-select fields weren’t handling `:empty:`/`:notempty:` params properly. ([#18988](https://github.com/craftcms/cms/issues/18988), [#19019](https://github.com/craftcms/cms/pull/19019))
+- Fixed a bug where entries with `{id}` in their Default Title Format weren’t always getting created with the correct generated title. ([#18991](https://github.com/craftcms/cms/issues/18991))
 
 ## 5.10.4.1 - 2026-05-28
 

src/base/Element.php

@@ -6653,6 +6653,13 @@ public function afterSave(bool $isNew): void
         }
     }
 
+    /**
+     * @inheritdoc
+     */
+    public function afterAssignedId(): void
+    {
+    }
+
     private function updateRelations(bool $isNew): void
     {
         if (!$this->hasFieldLayout()) {

src/base/ElementInterface.php

@@ -1875,6 +1875,13 @@ public function beforeSave(bool $isNew): bool;
      */
     public function afterSave(bool $isNew): void;
 
+    /**
+     * Performs actions after the element is assigned an ID.
+     *
+     * @since 5.10.5
+     */
+    public function afterAssignedId(): void;
+
     /**
      * Performs actions after an element is fully saved and propagated to other sites.
      *

src/elements/Entry.php

@@ -2991,6 +2991,18 @@ public function beforeSave(bool $isNew): bool
         return parent::beforeSave($isNew);
     }
 
+    /**
+     * @inheritdoc
+     */
+    public function afterAssignedId(): void
+    {
+        if (ElementHelper::isDraftOrRevision($this)) {
+            return;
+        }
+
+        $this->updateTitle();
+    }
+
     /**
      * Set the default values for attributes if certain conditions are met.
      *

src/services/Elements.php

@@ -4046,6 +4046,8 @@ private function _saveElementInternal(
                             $element->uri = str_replace($element->tempId, (string)$element->id, $element->uri);
                             $element->tempId = null;
                         }
+
+                        $element->afterAssignedId();
                     }
                 }