If you rename any item, it will dublicate. One item is the renamed one which isn't really there, it's just a texture and the other one is a unchanged item. This also works with stacked items.
If you rename any item, it will dublicate. One item is the renamed one which isn't really there, it's just a texture and the other one is a unchanged item. This also works with stacked items.
Can confirm, trying to rename an item will create a fake named item (only client-side I imagine) and the unnamed item will become invisible. Moving them around or relogging will show that the renaming never worked.