Prevent unsaved inherited scenes from being detected as the 'placeholder' scene

editor/editor_node.cpp

@@ -3751,7 +3751,7 @@ int EditorNode::new_scene() {
 	if (editor_data.get_edited_scene_count() > 1) {
 		for (int i = 0; i < editor_data.get_edited_scene_count() - 1; i++) {
 			bool unsaved = get_undo_redo()->is_history_unsaved(editor_data.get_scene_history_id(i));
-			if (!unsaved && editor_data.get_scene_path(i).is_empty()) {
+			if (!unsaved && editor_data.get_scene_path(i).is_empty() && editor_data.get_edited_scene_root(i) == nullptr) {
 				editor_data.remove_scene(i);
 				idx--;
 			}