Hi,
I changed the code:
to:
$old = clone($order);
$this->loadProducts($old);
in the file administrator/components/com_hikashop/classes/order.php
We've actually released a new version of HikaShop, the 4.4.5, which contains that fix.
So you can just update HikaShop to get the patch.
Note that since we just released it, we didn't activate the auto update. So for now, you would have to manually do the update by first downloading the install package of HikaShop on our website and installing it on your website.