New Copper and Tuff Blocks are uncraftable, being listed as "Disabled" items

In 23w43a, all the new copper and tuff blocks cannot be crafted. Their recipes appear in the crafting table, but not the stone cutter; and even then, the item will not craft, with a label underneath saying it is a "disabled item". I hoped this would be fixed in the next snapshot, but it does not appear so. Is there some way to fix this? Or do I have to enable them somehow?