Mods Not falling through portals

[Israel Rodriguez]

I modified my mob farm to have my mods fall though a large myst port in the ground and out to the room where the turtles will them. The cows, chickens and passive mobs make it through but non of the monsters do. Is there a setting somewhere that I can fix this. This setup does work in my single player world.

 

[Belone]

You are probably coming a cropper of the vanilla mechanic in which hostile mobs despawn when a player isn't near by, unfortunately there isn't a way around this...

 

[Israel Rodriguez]

is that only on servers. it works in single and it works when I'm not near the regular mob farm.