Ender Trap the super basic I need ender pearls but just started my world mob system

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graeme94

Guest
I don't if anyone still visits this thread, I could use some help. I've completed the set up like in the pictures, however whenever I get an Enderman's attention it just growls and disappears and doesn't run towards me. I'm at y=217 so i don't think they could be teleporting into any caves. Anyone have any ideas?