Cart Empties When Adding from Main Screen

If you go to the linked page and add the first item (Diversified Hair Complete Kit) using Add to Cart and visit your cart, it’s there. You can change the default product of Dark Brown, save it, and it’s still there. HOWEVER, if you instead click on the product and then either leave the default there or change it and add to cart at that point, it says it is in the cart. It’s not. And even if you have other items in the cart, away everything goes without a trace. This may have been like this all along, I don’t know. I discovered it today when I was attempting to open up to international sales, decided that’s what caused the problem, got rid of all that, and it still does it. So… it’s something else. ChatGPT gaslights and guesses so it was completely useless. My settings are unchanged. It seems to be just this one bundled item. I am at a loss.

The page I need help with: [log in to see the link]