I found a bug that "only" happens when your spawn point is "close" to an NPC. When you die and re-spawn the NPC becomes invisible. You can still hear his footsteps and hear him open and close doors but you can't see him. However if you die and re-spawn again, he will no longer be invisible. I did test this bug and it is definitely not a vanilla bug but a Forge #614 bug.

Vids if you can reporduce.

Also, if you can give us a download of your world with steps to reproduce.

Have not been able to reproduce things.

Ok here's a video I did of the bug:

 

[embed=425,349]http://www.youtube.com/watch?v=GTR0UKBRmas&feature=youtu.be[/embed]

Interesting does thius happen in servers with multiple peouple?

What it looks like is the client isnt being added to the entity tracker properly. Ill do some testing when i get home to see if i can repriduce this myself and go from there

I'm not sure if this happens on servers with multiple people. That is one thing that I did not test.

Try out build #629 I was able to reproduce and track it down to this commit, reverting seems to of worked, however may result in concurrency issues that the original commit attempted to fix.

If those do arise, I will look into a better solution to both issues.