i can confirm a similar bug. in fact i was just about to ask the same question. my setup is i'm using views with the bonus pack and i'm creating a page that shows a random set of products (with an add to cart/buy button) underneath each product. when they sort criteria is set to anything else other than random the buy button works and redirects to the cart with the item added in. but when it's set to random sorting, the buy button works just once then never again.

the form's HTML seems then same. the tokens seem to be generated properly. so im also at a loss.