Is "BEST_SELLING" in ProductSortKeys not working anymore?

Hi there,

I am building a storefront using the Buy SDK, and I am trying to send a product query using a sort key. My code looks a little something like this:

client.product.fetchQuery({ query: "query" , sortKey: "BEST_SELLING", reverse: false, first: 25 });

BEST_SELLING was working perfectly before to return a sorted list of products, and it all of a sudden stopped working today. It appears to me that the code is not the problem, as all other sortKey values such as “CREATED_AT”, “UPDATED_AT”, “PRICE”, reverse etc. Have there been any updates I am not aware of, or has anyone faced this issue?

Thank you so much for the help.