My enderman farm where they target the endermite in the middle doesn't work now because they just walk up to them, not realizing they can't get through and pathfinding to the walkway. With the trapdoor trap or without it (just solid blocks) t hey wont redirect to the other path to reach the target. 

Location: In the end over 128 blocks from the central island at a somewhat popular older enderman farm design by xBCrafted (https://www.youtube.com/watch?v=pHK_OSOgVh0)