When you kill a horse/donkey/mule that is attached to any kind of fence via lead, the lead will not drop, but it will still show the lead attached to the fence. When you click it to take it off the fence, it will not drop. I tested this multiple times in creative and survival with a horse, donkey, and mule, and the lead was never dropped.
- duplicates
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MC-15084 Leads not dropping when a leashed mob is killed
- Resolved