From 4810d1f40e4270cad75ce87bf3e43f7adf17a218 Mon Sep 17 00:00:00 2001
From: Duncan McClean <duncan@duncanmcclean.com>
Date: Fri, 14 Aug 2026 10:49:45 +0100
Subject: [PATCH] prevent moved and hidden child items reappearing when
 reordering nav children

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 src/CP/Navigation/NavBuilder.php           |  4 ++
 tests/CP/Navigation/NavPreferencesTest.php | 57 ++++++++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/src/CP/Navigation/NavBuilder.php b/src/CP/Navigation/NavBuilder.php
index 6acb2fbd36e..aef291e037e 100644
--- a/src/CP/Navigation/NavBuilder.php
+++ b/src/CP/Navigation/NavBuilder.php
@@ -20,6 +20,7 @@ class NavBuilder
     protected $itemsKeyedById = null;
     protected $withHidden = false;
     protected $itemsWithChildrenClosures = [];
+    protected $itemsRemovedFromChildren = [];
     protected $sections = [];
     protected $sectionsEmptiedByAuthorization = [];
     protected $sectionsOriginalItemIds = [];
@@ -736,6 +737,7 @@ protected function userModifyItem($item, $config, $section)
     protected function userModifyItemChildren($item, $childrenOverrides, $section, $reorder)
     {
         $itemChildren = collect($item->original()->resolveChildren()->children())
+            ->reject(fn ($child) => in_array($child->id(), $this->itemsRemovedFromChildren))
             ->each(fn ($item, $index) => $item->order($index + 1000))
             ->keyBy
             ->id();
@@ -884,6 +886,8 @@ protected function userRemoveItemFromChildren($item)
             return;
         }
 
+        $this->itemsRemovedFromChildren[] = $item->id();
+
         if ($this->urlsUnresolvedChildren->has($parent->id())) {
             $this->urlsUnresolvedChildren[$parent->id()] = collect($this->urlsUnresolvedChildren[$parent->id()])
                 ->reject(fn ($url) => $url === $item->url())
diff --git a/tests/CP/Navigation/NavPreferencesTest.php b/tests/CP/Navigation/NavPreferencesTest.php
index b9ef643821c..56b10f5bd3a 100644
--- a/tests/CP/Navigation/NavPreferencesTest.php
+++ b/tests/CP/Navigation/NavPreferencesTest.php
@@ -1128,6 +1128,63 @@ public function it_can_move_items_out_of_the_children_of_an_item_in_the_same_sec
         $this->assertArrayNotHasKey('Pages', $nav->get('Content')->keyBy->display()->get('Collections')->resolveChildren()->children()->map->display()->all());
     }
 
+    #[Test]
+    public function it_doesnt_show_moved_child_items_in_original_parent_when_reordering_remaining_children()
+    {
+        Facades\Collection::make('events')->title('Events')->save();
+
+        $nav = $this->buildNavWithPreferences([
+            'content' => [
+                'reorder' => true,
+                'items' => [
+                    'content::collections::pages' => '@move',
+                    'content::collections' => [
+                        'action' => '@modify',
+                        'reorder' => true,
+                        'children' => [
+                            'content::collections::events' => '@inherit',
+                            'content::collections::articles' => '@inherit',
+                        ],
+                    ],
+                ],
+            ],
+        ]);
+
+        $contentItems = $nav->get('Content')->keyBy->display();
+
+        $this->assertEquals(['Pages', 'Collections', 'Navigation', 'Taxonomies', 'Assets', 'Globals'], $contentItems->keys()->all());
+        $this->assertEquals(['Events', 'Articles'], $contentItems->get('Collections')->children()->map->display()->all());
+
+        Request::swap(Request::create('http://localhost/cp/collections/pages'));
+
+        $this->assertTrue($contentItems->get('Pages')->isActive());
+        $this->assertFalse($contentItems->get('Collections')->isActive());
+    }
+
+    #[Test]
+    public function it_doesnt_show_hidden_child_items_in_original_parent_when_reordering_remaining_children()
+    {
+        Facades\Collection::make('events')->title('Events')->save();
+
+        $nav = $this->buildNavWithPreferences([
+            'content' => [
+                'items' => [
+                    'content::collections::pages' => '@hide',
+                    'content::collections' => [
+                        'action' => '@modify',
+                        'reorder' => true,
+                        'children' => [
+                            'content::collections::events' => '@inherit',
+                            'content::collections::articles' => '@inherit',
+                        ],
+                    ],
+                ],
+            ],
+        ]);
+
+        $this->assertEquals(['Events', 'Articles'], $nav->get('Content')->keyBy->display()->get('Collections')->children()->map->display()->all());
+    }
+
     #[Test]
     public function it_can_move_child_items_into_another_items_children()
     {