diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
index efb509d..055faa5 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
@@ -61,7 +61,15 @@ public static PacketSender getAnyPacketSenderOrNull() {
 
     @EventHandler
     public void onPlayerJoin(PlayerJoinEvent e) {
+        PlayerImpl player = PlayerImpl.of(e.getPlayer());
+        player.setEncrypted(false);
+        player.setRemotePublicKeyInternal(null);
+        int i = player.joins.incrementAndGet();
         Bukkit.getScheduler().runTaskLaterAsynchronously(this, () -> {
+            if (player.joins.get() != i) {
+                return;
+            }
+
             KeyPair keyPair;
             try {
                 // generate keypair
@@ -69,7 +77,6 @@ public void onPlayerJoin(PlayerJoinEvent e) {
             } catch (Exception ex) {
                 throw new RuntimeException(ex);
             }
-            PlayerImpl player = PlayerImpl.of(e.getPlayer());
 
             // set keypair
             player.setKeyPair(keyPair);
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/entity/PlayerImpl.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/entity/PlayerImpl.java
index 862b37a..bb57c36 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/entity/PlayerImpl.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/entity/PlayerImpl.java
@@ -15,6 +15,7 @@
 import java.util.Objects;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
 
 public class PlayerImpl implements Player, PacketSender {
     private static final Map<UUID, PlayerImpl> MAP = new ConcurrentHashMap<>();
@@ -23,6 +24,7 @@ public class PlayerImpl implements Player, PacketSender {
     private PublicKey remotePublicKey;
     private boolean encrypted = false;
     public String challenge = null;
+    public AtomicInteger joins = new AtomicInteger();
 
     @Contract(value = "null -> fail", pure = true)
     private PlayerImpl(@Nullable org.bukkit.entity.Player handle) {