From d8b9822c1142eaafe55dd4cafef9ce55e83a750e Mon Sep 17 00:00:00 2001
From: Smart123s <28480228+Smart123s@users.noreply.github.com>
Date: Mon, 22 Mar 2021 20:46:49 +0100
Subject: [PATCH] Fix "Asynchronous player kick"

---
 .../fastlogin/bukkit/task/FloodgateAuthTask.java         | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/FloodgateAuthTask.java b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/FloodgateAuthTask.java
index b056b1f8..465c5d78 100644
--- a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/FloodgateAuthTask.java
+++ b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/FloodgateAuthTask.java
@@ -33,7 +33,14 @@ public class FloodgateAuthTask implements Runnable {
             plugin.getLog().info(
                     "Bedrock Player {}'s name conflits an existing Java Premium Player's name",
                     player.getName());
-            player.kickPlayer("This name is allready in use by a Premium Java Player");
+            
+            // kicking must be synchronous
+            // https://www.spigotmc.org/threads/asynchronous-player-kick-problem.168580/
+            Bukkit.getScheduler().runTask(plugin, new Runnable() {
+                public void run() {
+                    player.kickPlayer("This name is allready in use by a Premium Java Player");
+                }
+            });
 
         }
         if (!allowNameConflict.equalsIgnoreCase("true")