From f39c9e6b74128e38deebc25c5003c1dd2f487a5e Mon Sep 17 00:00:00 2001
From: Yash Suthar <yashsuthar983@gmail.com>
Date: Sun, 18 Jan 2026 07:35:43 +0530
Subject: [PATCH] App: Prevent addObjects from extracting children of nested
 groups (#26846)

* App: Prevent from extracting children of nested groups

Signed-off-by: Yash Suthar <yashsuthar983@gmail.com>

* Update src/App/GeoFeatureGroupExtension.cpp

---------

Signed-off-by: Yash Suthar <yashsuthar983@gmail.com>
Co-authored-by: Kacper Donat <kadet1090@gmail.com>
(cherry picked from commit 7aafb105f79d50e14bb2b823bef76e70f4364f97)
---
 src/App/GeoFeatureGroupExtension.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/App/GeoFeatureGroupExtension.cpp b/src/App/GeoFeatureGroupExtension.cpp
index 84e7ac3c59..b595818909 100644
--- a/src/App/GeoFeatureGroupExtension.cpp
+++ b/src/App/GeoFeatureGroupExtension.cpp
@@ -154,6 +154,16 @@ GeoFeatureGroupExtension::addObjects(std::vector<App::DocumentObject*> objects)
             continue;
         }
 
+        // Prevent from extracting children of nested groups fixed issue:#26743
+        // As groups manage their own local coordinate systems and children.
+        if (object->hasExtension(App::GeoFeatureGroupExtension::getExtensionClassTypeId())) {
+            if (!hasObject(object)) {
+                grp.push_back(object);
+                ret.push_back(object);
+            }
+            continue;
+        }
+
         // cross CoordinateSystem links are not allowed, so we need to move the whole link group
         std::vector<App::DocumentObject*> links = getCSRelevantLinks(object);
         links.push_back(object);