Empty delivery or billing address in order table

Hi,

Zen Cart version is 1.5.5e
PHP 7.x
template from Template Monsters

Sometime we can't see the billing or delivery address in the admin are on the order details page.
Unfortunately after order inserted to order table this fileds are empty.

I made a script and put it into the checkout confirmation page to save the page state before the customer confirmation is processed. The saved html output shows the addresses but those values are missing from the database table. The confirmation email content does not show that values too.

I noticed when i step back from confirmation page to delivery or payment method page and change the
option sometime the confirmation page shows the old method, after refreshing page, it is shows the correct one.

There is no error log in the log folder.

I was looking for solution but can't find, yet.
Any suggestion how can we detect the source of this error?

Thanks!

I have seen this issue one time. No logs, and nothing was peculiar about the order. Same configuration (1.5.5e/PHP7.1).

swguy:

I have seen this issue one time. No logs, and nothing was peculiar about the order. Same configuration (1.5.5e/PHP7.1).
We are still seeing this as well. Seems to be an extreme edge case and has been happening for years...

Just got a report of this on 1.5.7c - store does a TON of transactions and it has only happened twice.
Is it possible the session data is getting clobbered so that in includes/classes/order.php,

$billto = (!empty($_SESSION['billto']) ? (int)$_SESSION['billto'] : 0);
$sendto = (!empty($_SESSION['sendto']) ? (int)$_SESSION['sendto'] : 0);

winds up setting one or both to 0? If so, would it be better to do

$billto = (!empty($_SESSION['billto']) ? (int)$_SESSION['billto'] :  $_SESSION['customer_default_address_id']);
$sendto = (!empty($_SESSION['sendto']) ? (int)$_SESSION['sendto'] :  $_SESSION['customer_default_address_id']);