Bukkit

What steps will reproduce the problem?
1. on my server 198.24.160.34:28354
2. using /zs lobby-0 with 3 other players tps players to the arena and 1 player becomes zombie
3. the 'patient 0' is unable to interact or even see other players

What is the expected output? What do you see instead?
for the zombie to be able to see and interact with the human players.
The Zombie cannot see any players or interact with them even if they stand directly in front of them

What version of the product are you using?
1.4.2 for CB 1.6.2-R0.1

Do you have an error log of what happened?
no error log was created