big issue with prestashop 1.7.6.8

[TehranShop]

Hi Prestashop support Team

1- when you wanna to copy a product then (copy) letter in the copied product show the bug

mean: every product have a unique ID and then in the copied product don't show the copy letter

2- in the product page we can customize there is a product or not a product -

3- in the product page we can't customize product price or text = price: numbers             text:letters

4- the big problem is - when i add attachments files to any product - if the attachments have a MB or GB then the (resume) in any download application don't working fine

please fix these issues

Thanks