[Bug] Listener already listen

[klochk]

When the bug appears

Bug appears when i open inventory for player. I tried my own code and code from docs. But, they all also cause an error.

Error

java.lang.IllegalArgumentException: Listener already listening
    at net.minecraft.server.v1_12_R1.Container.addSlotListener(Container.java:56) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.EntityPlayer.syncInventory(EntityPlayer.java:236) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:219) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:159) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:233) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:140) [spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:845) [spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot.jar:git-Spigot-dcd1643-e60fc34]
    at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot.jar:git-Spigot-dcd1643-e60fc34]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_275]

My code

Provider:

public class SelectionProvider implements InventoryProvider {

    public static final SmartInventory INVENTORY = SmartInventory.builder()
            .id("myInventory")
            .provider(new SelectionProvider())
            .size(3, 9)
            .title(ChatColor.BLUE + "My Awesome Inventory!")
            .build();

    private final Random random = new Random();

    @Override
    public void init(Player player, InventoryContents contents) {
        contents.fillBorders(ClickableItem.empty(new ItemStack(Material.STAINED_GLASS_PANE)));

        contents.set(1, 1, ClickableItem.of(new ItemStack(Material.CARROT_ITEM),
                e -> player.sendMessage(ChatColor.GOLD + "You clicked on a potato.")));

        contents.set(1, 7, ClickableItem.of(new ItemStack(Material.BARRIER),
                e -> player.closeInventory()));
    }

    @Override
    public void update(Player player, InventoryContents contents) {
        int state = contents.property("state", 0);
        contents.setProperty("state", state + 1);

        if(state % 5 != 0)
            return;

        short durability = (short) random.nextInt(15);

        ItemStack glass = new ItemStack(Material.STAINED_GLASS_PANE, 1, durability);
        contents.fillBorders(ClickableItem.empty(glass));
    }

}

Fragment of listener code, that opens menu.

p.sendMessage(main.getLocale("select-kingdom"));
SmartInventory menu = SmartInventory.builder().id("kingdom-selection")
    .provider(new SelectionProvider())
    .size(4, 9)
        .title(main.getLocale("inventory-selection"))
    .closeable(false)
    .build();

menu.open(p);

[klochk]

Solved. Just used timeout before open gui.