### 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
ScriptLanguage::CodeCompletionOption option(*kw, ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
		r_result.insert(option.display, option);
		kw++;
	}
	static const char *_keywords_with_space[] = {
		"and", "not", "or", "in", "as", "class", "class_name", "extends", "is", "func", "signal", "await",
		"const", "enum", "static", "var", "if", "elif", "else", "for", "match", "when", "while",
		nullptr
	};
	const char **kws = _keywords_with_space;
	while (*kws) {
		ScriptLanguage::CodeCompletionOption option(*kws, ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
		option.insert_text += " ";
		r_result.insert(option.display, option);
		kws++;
	}
	static const char *_keywords_with_args[] = {
		"assert", "preload",
		nullptr
	};
	const char **kwa = _keywords_with_args;
	while (*kwa) {
		ScriptLanguage::CodeCompletionOption option(*kwa, ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
		option.insert_text += "(";
		r_result.insert(option.display, option);
		kwa++;
	}
	List<StringName> utility_func_names;
	Variant::get_utility_function_list(&utility_func_names);
	for (List<StringName>::Element *E = utility_func_names.front(); E; E = E->next()) {