I renamed a gold block "Butter Block", put it down, removed it from my inventory, then middle-clicked (Pick Block) the block I put down, but it shown up as "Block of Gold" not the custom name "Butter Block". I suggest to store data in the blocks placed.
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Duplicate of MC-209 , please use the search function to see if your bug has already been submitted. Currently over 45% of tickets are being closed as duplicate.