Mobs disappear upon player death

I'm messing around with mobs (particularly the new Shulkers) when I notice quite a problem. When I died, all the mobs that were on screen during my death would not render at all when I respawned! Of course, this led to many problems since I could no longer interact with them directly until relogging.

What I expected to happen was...:
When I respawn, the mobs that I saw should still be visible.

What actually happened was...:
The mobs were invisible, yet were still fully present. For example, a Blaze after respawning was invisible and couldn't be directly attacked, but still showed its distinct smoke.

Steps to Reproduce:
1. Spawn mobs in front of you.
2. Die when you are near the mobs or are viewing them, perhaps with /kill.
3. Witness how most or all mobs disappear after respawning.