Cart Promotions - How To Change Product Variations Added To Cart

For products added to cart with a cart promotion... where a customer spends a certain amount ... how do you make it possible for the customer to change the product variation of the product that was added to the cart. Would like to be able to select a different product variation (color, style etc)... it worked before with options.. but no longer with Variations... does anyone know how to fix this or ways around accomplishing this?

will it be fixed in the forthcoming upgrade?