### 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
if (!p_enum_hint.contains(".")) {
		
		StringName current_enum = p_enum_hint;
		if (p_context.current_class && p_context.current_class->has_member(current_enum) && p_context.current_class->get_member(current_enum).type == GDScriptParser::ClassNode::Member::ENUM) {
			const GDScriptParser::EnumNode *_enum = p_context.current_class->get_member(current_enum).m_enum;
			for (int i = 0; i < _enum->values.size(); i++) {
				ScriptLanguage::CodeCompletionOption option(_enum->values[i].identifier->name, ScriptLanguage::CODE_COMPLETION_KIND_ENUM);
				r_result.insert(option.display, option);
			}
		} else {
			for (int i = 0; i < CoreConstants::get_global_constant_count(); i++) {
				if (CoreConstants::get_global_constant_enum(i) == current_enum) {
					ScriptLanguage::CodeCompletionOption option(CoreConstants::get_global_constant_name(i), ScriptLanguage::CODE_COMPLETION_KIND_ENUM);
					r_result.insert(option.display, option);
				}
			}
		}
	} else {
		String class_name = p_enum_hint.get_slice(".", 0);
		String enum_name = p_enum_hint.get_slice(".", 1);
		if (!ClassDB::class_exists(class_name)) {
			return;
		}
		List<StringName> enum_constants;
		ClassDB::get_enum_constants(class_name, enum_name, &enum_constants);