Why can't I order a deskpad with other items from the same groupbuy collection to my cart?

As of May 7, 2021, groupbuy deskpads must be purchased separately from other items within the groupbuy collection. These typically end up with different fulfillment timelines, and we can no longer store and hold back product waiting for the last item(s)' arrival for complete order fulfillment as we have in the past.