I have two shelves with items on them. For a long time I could easily just grab the items off both shelves. Then one day I suddenly got a message saying "Can't Reach!" when I tried to grab the items off the right half of the second shelf. The items on the left side can be grabbed. The items on the first shelf can be grabbed. Does anyone have any idea what could be causing this? I've tried deleting the shelf and remaking it with no luck.