I did update to the latest version of Hikashop Business, 3.1.1. (By the way, I am a web designer – my client has the license and the URL in the first post is licensed. I can provide proof if needed.)
Unfortunately, the same problem happens. These are the settings:
For some reason the preview does say 'no data' at the end:
This is the email that's sent to the customer, with no custom fields:
I noticed that you have asked others to check the email templates – how do you tell if it has been customized? I think this is the right one:
The custom field does show up during checkout. However, it does not show up in the customer email, admin notification email or in the back end:
This is what it looks like when I click to edit the order:
How can I get the field to be recorded in the back end, and show in the emails?