When choosing a variable option for a product, the product that is placed in the cart is the default selections for that product. Here's a link to an image of a page:
https://dracodrop.info/nextcloud/index.php/s/DgPFkLLQnn659SQ
As noted, the item chosen is blue and large, but the item in the cart is still a small red.
We do not know how to get this to correctly synchronized from the options to the cart.