Add product to cart, continue shopping, cart empty

I am having an issue whereas I add a single product to the cart, and when I continue shopping via the button on the cart, the header nav shows an empty cart, and if I view the cart, it is in fact, empty. If I add multiples, it shows as designed. I have tried reloading the prducts, re-categorizing products, but no luck. This only occurs on the adding a single, first product.