@Harry
Thank you for taking the time to look into this.
This is happening on almost every customer’s computer as well as ours here in the office, so I don’t think it is an issue with my PC.
That said, I tried it in incognito mode (no cache, cookies, etc) and was still able to reproduce the issue:
Go to the home page
Scroll to featured products
Hover over one and click quick view
Add to cart
Click “shop” in the menu
Scroll down and hover over a hat and click quick view, then add to cart
That hat did not add to the cart
If that doesn’t work for any reason, keep repeating the process going back and forth to the home page.
It generally stops working after one navigation for me.