125046 Apr 2026

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

: If your sorter is set to look for "clean" items, renamed items will bypass the filter and end up in the overflow chest. 125046

: Renamed block entities (like Chests or Shulker Boxes) are also affected, meaning you cannot stack renamed storage containers. MC-125046 is a documented where items renamed using

This bug is particularly frustrating for players using : This bug is particularly frustrating for players using

The bug occurs because the game applies a RepairCost tag even if the item hasn't been repaired, just renamed. Since the game only stacks items with identical NBT data, a renamed item (with RepairCost: 0 or higher) will not stack with a standard item (which has no tag at all). How to Manage Renamed Items

Placing a renamed item in a Grindstone will remove the custom name. : This also removes enchantments.

I can help you with more specific Minecraft technical guides, such as: Calculating anvil experience costs for high-level gear