SpigotCore_14/src/de/steamwar/inventory/SWItem_14.java

@@ -271,7 +271,7 @@ class SWItem_14 {
         ItemStack head = new ItemStack(Material.PLAYER_HEAD, 1);
         SkullMeta headmeta = (SkullMeta) head.getItemMeta();
         assert headmeta != null;
-        Player p = Bukkit.getPlayer(player);
+        Player p = Bukkit.getPlayerExact(player);
         if (p != null) {
             headmeta.setOwningPlayer(p);
         } else {