Bug: set_checkbox, set_radio not working default true.

[yks118]

Describe the bug
form_helper.php load and code write set_checkbox('field', 'value', true); return value ''.
not return ' checkbox="checked"'.

CodeIgniter 4 version
4.0.3
4.0.2 is work.

Affected module(s)
/system/Helpers/form_helper.php

Expected behavior, and steps to reproduce if appropriate
/app/Controllers/BaseController.php in form_helper.php load.
view folder write code.

var_dump(set_checkbox('field', 'value', true));

return value is ''.
method GET not POST.

Context

• OS: Ubuntu 18.04
• Web server: nginx/1.19.0
• PHP version: PHP 7.4.7