src/Mod/Assembly/App/AssemblyObject.cpp

@@ -139,6 +139,11 @@ App::DocumentObjectExecReturn* AssemblyObject::execute()
 
 void AssemblyObject::onChanged(const App::Property* prop)
 {
+    if (App::GetApplication().isRestoring()) {
+        App::Part::onChanged(prop);
+        return;
+    }
+
     if (prop == &Group) {
         updateSolveStatus();
     }