Solved is something recently changed with fireworks?

Hello,

so for some time it seems the server thread is freezing when a player steps on a pressure plate which fires 50 signs which are redstone connected to launch firework, in the past this won't freezes the thread but for some reason it does now.

ive looked in visualVM to search into the problem but sadly enough I wasn't able to find it, I only saw that some internal classes using netty where incredible on a high rate, is this normal?

anyways I post my very old code though in case there is something changed with fireworks:

Code:

public class FireworkSign implements Listener {
   
    public HashMap<String, String> colours = new HashMap<String, String>();
    @EventHandler
    public void fireworksign(SignChangeEvent e) {
        if(e.getLine(0).equalsIgnoreCase("[firework]")) {
            if(e.getPlayer().hasPermission(PermissionKey.SIGN_FIREWORK.getPermission())) {
                if(colours.isEmpty()) {
                    for(DyeColor color : DyeColor.values()) {
                        colours.put(color.name(), color.name());
                    }   
                }
                if(colours.containsKey(e.getLine(1).toString().toUpperCase().replace(" ", "_")) || e.getLine(1).contains("random")) {
                    e.setLine(0, ChatColor.DARK_BLUE + "[Firework]");
                    e.setLine(1, e.getLine(1).toLowerCase());
                    e.getPlayer().sendMessage(ChatColor.GREEN + "you successfully placed a firework sign!");
                    e.getBlock().getState().update();
                    colours.clear();
                } else {
                    e.getBlock().breakNaturally();
                    e.getPlayer().sendMessage(ChatColor.RED + "a colour is needed to create this sign");
                    colours.clear();
                }
            } else {
                if(e.getLine(0).equalsIgnoreCase("[firework]")) {
                    e.getBlock().breakNaturally();
                    e.getPlayer().sendMessage(ChatColor.RED + "you are not allowed to place these signs\n" + ChatColor.WHITE + "permission: xEssentials.signs.firework");
                }
            }
        }
    }
    @EventHandler
    public void redstone(BlockRedstoneEvent e) {
        if(e.getBlock().getType() == Material.SIGN_POST) {
            if(e.getNewCurrent() > 0) {
                Sign sign = (Sign) e.getBlock().getState();
                if(sign.getLine(0).contains("[Firework]") || sign.getLine(0).contains("[firework]")) {
                    for(DyeColor colour : DyeColor.values()) {
                        colours.put(colour.name(), colour.name());
                    }
                    if(colours.containsKey(sign.getLine(1).toString().toUpperCase().replace(" ", "_"))) {
                        Location loc = e.getBlock().getLocation();
                        Firework fw = (Firework) e.getBlock().getLocation().getWorld().spawnEntity(loc, EntityType.FIREWORK);
                        FireworkMeta fwm = fw.getFireworkMeta();
                        Random r = new Random();
                        Type type = Type.BALL;
                        int rt = r.nextInt(4) + 1;
                        if(rt == 1) type = Type.BALL;
                        if(rt == 2) type = Type.BALL_LARGE;
                        if(rt == 3) type = Type.BURST;
                        if(rt == 4) type = Type.CREEPER;
                        if(rt == 5) type = Type.STAR;
                        DyeColor dyecolor = (DyeColor) DyeColor.valueOf(sign.getLine(1).toUpperCase().replace(" ", "_"));
                        Color color = dyecolor.getColor();
                        FireworkEffect effect = FireworkEffect.builder().flicker(r.nextBoolean()).withColor(color).with(type).trail(r.nextBoolean()).build();
                        fwm.addEffect(effect);
                        int rp = r.nextInt(2) + 1;
                        fwm.setPower(rp);
                        fw.setFireworkMeta(fwm);
                    } else {
                        if(sign.getLine(1).contains("random")) {
                            for(DyeColor colour : DyeColor.values()) {
                                colours.put(colour.name(), colour.name());
                            }
                            Random rand = new Random();
                            Object[] entries = colours.values().toArray();
                            Object randomValue = entries[rand.nextInt(entries.length)];
                            DyeColor randomColor = DyeColor.valueOf((String) randomValue);
                            Color random = randomColor.getColor();
                            Location loc = e.getBlock().getLocation();
                            Firework fw = (Firework) e.getBlock().getLocation().getWorld().spawnEntity(loc, EntityType.FIREWORK);
                            FireworkMeta fwm = fw.getFireworkMeta();
                            Random r = new Random();
                            Type type = Type.BALL;
                            int rt = r.nextInt(4) + 1;
                            if(rt == 1) type = Type.BALL;
                            if(rt == 2) type = Type.BALL_LARGE;
                            if(rt == 3) type = Type.BURST;
                            if(rt == 4) type = Type.CREEPER;
                            if(rt == 5) type = Type.STAR;
                            FireworkEffect effect = FireworkEffect.builder().flicker(r.nextBoolean()).withColor(random).with(type).trail(r.nextBoolean()).build();
                            fwm.addEffect(effect);
                            int rp = r.nextInt(2) + 1;
                            fwm.setPower(rp);
                            fw.setFireworkMeta(fwm);
                        } else {
                            //illegal colour.
                        }
                        //illegal colour.
                    }
                }
            }
        }
    }
}

thanks for the help though!

-edit-

just wrote a way to unregister that event so I could test it without the redstone and something else cause this so I have to check all PlayerInteractEvents which goes psysical.