vile vultures sometimes disappear

hello,

in the spires of deshar (act 2), sometimes the vile vultures disappear while they are moving, but this is only a graphical error, as they become visible again when they attack.

the period of invisibility is obviously a bug, because it doesn't transition nicely like a stealthy enemy probably would. so far i've mainly noticed it when walking up or down the small flights of stairs that are on some walkways between spires.

pelase fix.

thanks.
-az