The difference between zen cart 1.5.8 versions and older versions is the difference in language files and comment data.
\includes\languages\lang.english.php and \includes\languages\english.php
Please check the files yourself .
When creating the stripe module, comments are added in the session ($_SESSION['order_add_comment']) because zen cart versions 1.5.7 cannot retain the comment content from the checkout payment page to the checkout confirmation page.
added files are as follows.
\includes\modules\pages\checkout_payment\header.php.php
\includes\templates\YOUR_TEMPLATE\templates\tpl_checkout_payment_default.php
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