Leads disappear when you go and come back from the dimension

If you tied up an animal to a fence, then go for the Nether or End, and come back to the Overworld, the lead will disappear

Steps to Reproduce:
1. Tied up an animal to a fence
2. Go to the Nether or End
3. Come back to the Overworld.
Here's a video showing it better:
http://www.youtube.com/watch?v=OpyZ0JqLoO4&feature=youtu.be