Question 1.20.4/.6 sand duping


New member
Jun 21, 2024
Hello, recently i built a gravity block duper on a server I play on, I have been regularly in contact with an admin of this server and he is ok with what I am doing. But the sand isnt duping. I know it's not a problem with the machine, because I copy and pasted it into a creative world and it worked fine in that.
Stuff that I have:
allow-piston-duplication: true
allow-perm-block-break-exploits: true
allow-tripwire-disarming-exploits: true

I don't know where to go from here
pls help
Version Output
This server is running Paper version git-Paper-496 (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: 7ac24a1 on ver/1.20.4)
You are 1 version(s) behind
Download the new version at:
Previous version: git-Paper-463 (MC: 1.20.4)