Leads/Leashes disappearing when used on aggressive dog/wof who dies.

What I expected to happen was...:
As normal, when the animal who dies while a leash/lead is attached, the leash/lead will drop as an obtainable item.

What actually happened was...:
Now when I put a leash/lead on a normal dog/wolf and accidently hit it, it goes all agro-mode. In this mode, I have no choice to kill it, keep in mind the leash is still on it. Once dead, the leash/lead disappeares.

Steps to Reproduce:
1. Get a leash/lead
2. Right click a wolf with it in your hand
3. Attack the Stray Wolf
4. Kill the newly found Aggroed Out wolf with the leash on it
5. No leash to be found once its dead.