I found this bug back in 1.16.5 and it still works on: Windows/Android/Ios. The bug is that if you tie an animal on a leash and attach it to a fence and break this fence, then the leash will not immediately disappear, but will remain in the air for a few more seconds. I think this bug can be fixed by adding a check to the leash code: if the leash is on the fence, then check: is there a fence block in which the leash is located? If yes: then nothing happens. If not: break and drop yourself. I hope you will solve this problem. Thanks!