cant duplicate sand

hello, i cant duplicate sand in aternos servers, i am doing a sand duplicator, it works great, but the sand doesnt apear in the end. I try this same duplicator in a offline world in my pc and this works fine, the sand goes to the end, but not in my server. I discovered how to fix problem with duplicate tnt and break the portal frame, with changing a value in any file, but i wasnt found anything in the same file, if anyone had the same problem pls coment this thread, PD: i am using paper MC software

yes i am using paper mc

uhm, i fix it. the problem was the server doesnt load the overworld at the same time than end. So there was never any problem. lol