When the spider is killed from a spider jockey, the skeleton becomes invisible.

I start to battle the spider jockey and everything's going normal. Once I defeat the spider, the skeleton is still alive and becomes invisible. Its arrows are still flying at me and damaging me, but I can't see it. After a while, the skeleton SOMETIMES appears. This has happened to me a few times since the 1.4.2 update. I'm on survival mode-easy.

What I expected to happen was...:
After I killed the spider, I assumed the skeleton would dismount and begin to attack me like they normally do.

What actually happened was...:
The skeleton did in fact continue to attack me, but it became completely invisible. I was taking damage from the arrows, and I could still hear the skeleton.

Steps to Reproduce:
1. Attack the bottom half of the jockey, i.e. the spider.
2. The skeleton should dismount and disappear.
3. n/a