Block.getWorld returns wrong chunk

I was going to create a VeinMine plugin where if you break a block it will automatially mines all block around it within a 3*3*3 box. During the process i encountered a problem:
Code:

Code:

public class VeinPick implements Listener {
   
    @EventHandler
    public void onMine(BlockBreakEvent ev) {
        Player p = ev.getPlayer();
        Block b = ev.getBlock();
        ItemStack mainhand = p.getInventory().getItemInMainHand();
        // gets broken block and item used
       
       // 3 if to check if the player holding right item
        if (mainhand.getType().equals(Material.DIAMOND_PICKAXE)) {
            if (mainhand.getItemMeta().hasDisplayName()) {
                if (mainhand.getItemMeta().getDisplayName().contains(ChatColor.GOLD + "Block Smasher")) {
                    // "bounding box" around the broken block. low and top are 2 corners of the box
                    Location low = b.getLocation().subtract(1,1,1);
                    Location top = b.getLocation().add(1,1,1);
                    // ArrayList of all block locations
                    ArrayList<Location> locs = new ArrayList<Location>();
                    // Iterate throught all locations, everything works fine till the end of this nested for loop
                    for (int x = low.getBlockX(); x <= top.getBlockX(); x++) {
                        for (int y = low.getBlockX(); y <= top.getBlockX(); y++) {
                            for (int z = low.getBlockX(); z <= top.getBlockX(); z++) {
                                locs.add(new Location(b.getWorld(), x, y, z));
                            }
                        }
                    }

                    // p.sendmsg for debugging
                    for (Location l : locs) {
                        p.sendMessage(l.getBlock().toString());       
                    }
                   
                    p.sendMessage("block=" + b.getChunk().toString());
                    p.sendMessage("world=" + b.getWorld().toString());
                }
            }
        }  
    }
}

The problem is here, all blocks saved in the arraylist was saved with wrong chunk, the slime block was where the block was broken using the pickaxe
What could be a potential way to fix this?