Item loop won't remove last item

With the loop below, the item in a player's inventory will drop down to a single, "ghost" item, where it will appear and disappear from the inventory randomly, but can easily be duplicated.

For instance, if the item stack size is 2, it will go down to 2 items, then one item, then "ghost."

I've tried the loop without p.updateinventoty(), as well as p.getInventory().setContents(p.getInventory().getContents());

Loop:

Code:java

@SuppressWarnings("deprecation")
    public void withdrawItem(int tier, Player p) {
        // Config variables
        int itemChargeAmount = config.getItemChargeAmount(tier);
        // gets item name enum
        //String itemChargeEnum = config.getItemChargeEnum(tier);
        // gets inventory server
        PlayerInventory inventory = p.getInventory();
        // gets itemstack
        // ItemStack itemStack = new
        // ItemStack(Material.getMaterial(itemChargeEnum), itemChargeAmount);
 
        // checks if item charge is enabled
        if (itemChargeAmount == 0) {
            // returns true if no items are needed to fly
 
        } else if (config.getItemMetaTag(tier).contains("-1")) {
            // checks if player has item and amount
            for (ItemStack is : inventory) {
 
                if (is == null || is.equals(Material.AIR)) {
                    continue;
                }
 
                if (is.getItemMeta().getLore() != null) {
 
                    continue;
                }
 
                if (itemChargeAmount > is.getAmount()) {
 
                    Flight.disableFlight(p, tier, 4);
                    continue;
                }
                if (is.getAmount() == itemChargeAmount) {
                    is.setAmount(0);
                    // updates player's inventory
                    p.getInventory().setContents(p.getInventory().getContents());
                    continue;
                }
                // remove's players item
                is.setAmount(is.getAmount() - itemChargeAmount);
                // updates player's inventory
                p.getInventory().setContents(p.getInventory().getContents());
                break;
            }
 
        } else {
            // iterates through player's inventory
            // int itemAmount = 0;
            for (ItemStack is : inventory) {
 
                if (is == null || is.equals(Material.AIR)) {
                    continue;
                }
                if (!is.hasItemMeta()) {
                    continue;
                }
                ItemMeta itemmeta = is.getItemMeta();
                List<String> lore = itemmeta.getLore();
                if (!lore.contains(config.getItemMetaTag(tier))) {
                    continue;
                }
                if (is.getAmount() == itemChargeAmount) {
 
                    is.setAmount(0);
                    // updates player's inventory
                    // p.getInventory().setContents(p.getInventory().getContents());
                    p.updateInventory();
                    continue;
                }
                if (itemChargeAmount > is.getAmount()) {
                    continue;
                }
                // remove's players item
                is.setAmount(is.getAmount() - itemChargeAmount);
                // updates player's inventory
                // p.getInventory().setContents(p.getInventory().getContents());
                p.updateInventory();
                break;
            }
        }
    }

thanks for the help!

 

if you want to set the item to "0" ammount, you need to set it to air instead