Hi there,
Thank you for reaching out, and I apologize for any inconvenience caused by this oversight. To better address the issue, could you kindly provide Joomla administrator access? This will enable me to thoroughly investigate the matter and provide you with a prompt resolution.
Or you can use this URL inside the logout file.
index.php?option=com_users&view=login&layout=logout&task=user.menulogout
I appreciate your cooperation and will ensure to get back to you as soon as possible.
Best regards,
Toufiqur Rahman (Team Lead, Support)