The bug
As can be seen in the attached pictures, the lead when attached to a horse to a fence post is not displayed properly in some angles. The lead can go through the horse, appear above the horse even though it is still connected, etc. This also applies for donkeys and mules.
Linked issues
is duplicated by 3
Attachments
Comments 17

This issue still occurs in the b-side of the snapshot, thus the affected versions and title have been update appropriately.
Also, the lead appears to be over the shoulder of the user, not is his hand. I saw a bug reort of this, but cannot find it now.
Updated this bug along with many of others of mine, will continue to update as well until fixed.
confirmed for 14w32b
Can confirm in 20w48a.
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.