Content still appear at remark form even done purchase.

-- url of the page with the problem -- : bayanlepas.happinesstoyou.com.my
-- HikaShop version -- : 4.3.0
-- Joomla version -- : 3.9.21
-- PHP version -- : 7.3.31
-- Error-message(debug-mod must be tuned on) -- : The error is the content still available at remark form even we done purchase.

Hi, I used custom fields to do the form. When customers write down remarks and they success purchase or cancel , when they come back to the page the content does not refresh when using the same account.