Steps to Reproduce:
1. Place an armor stand
2. Run the command: /replaceitem entity @e[type=armor_stand] slot.armor.anyslothere 1 anyblockhere 1
3. The block will not show off, but if you break it, it will drop the block
Related issues
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Cleaning up old tickets: This ticket has not been updated recently (1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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