125046

: A hidden value that increases the experience cost of future anvil uses.

In some versions, the Grindstone may still leave a RepairCost: 0 tag, which might still cause stacking issues with "clean" items. 3. Mass Renaming If you want a stack of renamed items to stay together: Rename the at once in the anvil. 125046

MC-125046 is a documented where items renamed using an anvil are assigned a "RepairCost" NBT tag, preventing them from stacking properly with identical items. Technical Overview : A hidden value that increases the experience

Using in Creative Mode to manually fix item tags Minecraft Snapshot 23w33a 125046

: If your sorter is set to look for "clean" items, renamed items will bypass the filter and end up in the overflow chest.