Skull heads when deleting playerdata

I have a server for testing plugins. I have only TWO plugins:
- WorldEdit
- Hub (A plugin I've made)

There is a functionality in the Hub plugin. Every time a user joins clear their inventory and set the 8th item in their inv to their head. (Skull)

I also run a script every time the server start which deletes:
- ops.json
- banned-players.json
- world
- et cetera.

And then I copy a built map into the main directory and rename it to world. (The map doesn't have nothing in playerdata)

Then when I join the server, I get the skull but with the alex skin. Only after I rejoin I see my skin.
It happens to other players also, and this is driving me crazy.

What should I do? Thanks for help

Edit:
start.bat:

Code (Text):

:mc
rd world /q /s
rd world_nether /q /s
rd world_the_end /q /s
rd logs /q /s
rd crash-reports /q /s
del whitelist.json /q
del usercache.jon /q
del ops.json /q
del banned-ips.json /q
del banned-players.json /q
del bukkit.yml /q
del commands.yml /q
del permissions.yml /q
del spigot.yml /q
del server.properties /q
del help.yml /q
xcopy default\spawn_map world /h /i /q /e
copy default\server.properties server.properties
copy default\bukkit.yml bukkit.yml
copy default\spigot.yml spigot.yml
java -jar spigot.jar
goto mc

InventoryGUI.java:

Code (Text):

package org.seklyza.mynznetwork.hub.utils;

import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.inventory.meta.SkullMeta;

public class InventoryGUI {
    public static final void giveItems(Player player) {
        PlayerInventory inv = player.getInventory();
     
        inv.clear();
     
        ItemStack playerSkull = createSkull(player.getName(), "Your details");
     
        inv.setItem(7, playerSkull);
    }
    private static ItemStack nameItem(ItemStack item, String name) {
        ItemMeta meta = item.getItemMeta();
        meta.setDisplayName(name);
        item.setItemMeta(meta);
        return item;
    }
    private static ItemStack nameItem(Material item, String name) {
        return nameItem(new ItemStack(item), name);
    }
    private static ItemStack createSkull(String playerName, String name) {
        ItemStack skullItem = nameItem(Material.SKULL_ITEM, name);
        SkullMeta skullMeta = (SkullMeta) skullItem.getItemMeta();
        skullMeta.setOwner(playerName);
        skullItem.setItemMeta(skullMeta);
        skullItem.setDurability((byte)3);
        return skullItem;
    }
}

 

Just set the load key in the plugin.yml?

 

Well, it doesn't work. I think the skin details are in the playerdata folder but not sure

Edit: Also tried player.saveData();

 

Tried that before, now I did it again, and still, no success

 

bump

 

Ok, I switched to Spigot version 1.9.4 and it works now. Perhaps specific to 1.11.x