Is it possible to set disallowing walls' join of each wall?

I tried to set each walls’ start and end join via Zhukoven’s Walls.DisallowJoinAtEnd, but it seems the lacing, or something wrong. I tried to find the case similar with me, but I couldn’t. Where was I wrong, or is the node doesn’t work with lists?

DISALLOW.dyn (44.9 KB)