Custom item field stop working

-- url of the page with the problem -- : flyshoes.ru/muzhchinam/obuv-muzhskaya-gi...aya-giuseppe-zanotti
-- HikaShop version -- : 3.2.0
-- Joomla version -- : 3.7.5
-- PHP version -- : 7.1

I have a shop where customer can choose size of the shoes with custom item field
It works on 2.6.4 but stop working after upgrade to 3.2.0

I believe that it is not a bug but something with customization but can understand where is the problem.

The shoe successfully added to the cart but without this field.

Could you help me?

That was really helped!
Thank you !