### Godot version

4.2 f5696c3

### System information

Windows 10 x64

### Issue description

![image](https://github.com/godotengine/godot/assets/2223172/7ad0e3b6-9599-4f7b-a07c-da54779e647a)


### Steps to reproduce

1. Add node
2. Attach a built-in script
3. Add child node
4. Add script to the child node
5. In some method write `get_parent().bui`

### Minimal reproduction project

N/A
r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS;
								r_result.class_name = obj->get_class();
							}
							
							if (r_result.class_name.begins_with("_")) {
								r_result.class_name = r_result.class_name.substr(1);
							}
							return OK;
						}
					} else {
						/*
						// Because get_integer_constant_enum and get_integer_constant don't work on @GlobalScope
						// We cannot determine the exact nature of the identifier here
						// Otherwise these codes would work
						StringName enumName = ClassDB::get_integer_constant_enum("@GlobalScope", p_symbol, true);
						if (enumName != nullptr) {
							r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_ENUM;
							r_result.class_name = "@GlobalScope";
							r_result.class_member = enumName;
							return OK;
						}
						else {
							r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_CONSTANT;
							r_result.class_name = "@GlobalScope";
							r_result.class_member = p_symbol;
							return OK;
						}*/
						r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_TBD_GLOBALSCOPE;
						r_result.class_name = "@GlobalScope";
						r_result.class_member = p_symbol;