I found by moving your laggy structure with MCedit from one world to another it fixed it? May be a bug with the world, or certain conditions of lighting/height. I don't know. Tell me if it works for you guys?
Serilex Boulderfist
MC-28563
I found by moving your laggy structure with MCedit from one world to another it fixed it? May be a bug with the world, or certain conditions of lighting/height. I don't know. Tell me if it works for you guys?