Hello, @Giuseppe,
Sorry for the late reply as my colleague is on leave today, I have checked your site now at my end and it is working perfectly fine for me on home page and on the single product page as well, please watch this video I have recorded for you: https://www.veed.io/view/888bdb54-3414-4155-aba7-0d68eade79bf?sharingWidget=true
So it must be the cache issue at your end nothing else, please try to clear the cache and cookies and check back again.
Regards 8Themes Team.