Product fields not being recorded

-- url of the page with the problem -- : www.boatingwithdawsons.com/boating-store...es-pdf-download.html
-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6
-- Browser(s) name and version -- : Firefox 53.0.2
-- Error-message(debug-mod must be tuned on) -- : (none)

I have this one product set up, where people can order a copy of an old(/classic) boat brochure from an extensive library. Because there are too many to list, we just have the customer request the exact make/model/year of boat they're looking for, and then the order gets filled based on what they requested.

It seems to work fine on the front end, and if the customer tries to leave fields blank they can't continue to the cart (see attachment "required-fields.png") and when you go to the checkout, all of the information is visible there, (see attachment "cart.png") however, when the orders come in, recently they have stopped including any of these additional fields, except for one. (see attachment "missing-fields.png")

This seemed to roughly coincide with an update that required me to remove some customization from some emails, so I don't know if it's related at all, but either way, I can't think of a reason why the information would stop showing at all, in the emails as well as in the hikashop admin under orders.

Any help with figuring this out is much appreciated!

Oops, my attachments failed. here they are.