I have this huge pigman grinder for XP, made by ilmango on youtube. When I open the world in a vanilla server jar, the pigman die to EntityCramming by having 24 carts in the same block, xp comes out below a slab and i collect it, but, when i open the same world in a spigot server, it stops working, i entered creative and did a smaller version of the same farm in the overworld using spawn eggs and still, xp was not dropping, i tried recreating this in older versions of spigot (1.13.2|This server is running CraftBukkit version git-Spigot-1a3504a-dfa7583 (MC: 1.13.2) (Implementing API version 1.13.2-R0.1-SNAPSHOT) and the problem continues