The item is not added to the inventory if only one item drops when vein mining while the auto pickup option is enabled.

The item from the first block broken when using the shape excavate option also isn't added to the inventory.

This happens on minecraft v1.20.1 and mod v1.5.9-1.20. Please let me know if there's any other information I could provide.

Please close this issue if that is the intended behavior, and I'm sorry to waste your time.