Why wont my Chaos elemental farm not spawn elementals? every mob except chaos elementals spawned in my farm. I even use frog legs but they still wont spawn

You have to place pearlstone down as the platform and remove the background walls in your afk box area because they won’t spall when the player had background walls. Also if you grapple to the top it will count you as moving which is also a requirement for them to spawn.