Hi,
I see "CONTACT" word or link showing from menu on product image inside category pages when scrolling down page. (https://homescreen.pl/en/galaxy-s8/)
I found this design issue on ubuntu and opera browser.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/