fix(bukkit): 玩家跨服传送时无法抵达目的地

hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/listener/BallBukkitListener.java

@@ -124,13 +124,16 @@ public class BallBukkitListener implements Listener, BallListener {
     public void onPlayerLogin(PlayerLoginEvent event) {
         Player player = event.getPlayer();
         Pair<Location, DisplayMessage> pair = playerToLocation.remove(player.getUniqueId());
-        if (pair != null) {
+        if (pair == null) {
+            return;
+        }
+        HamsterBallPlugin.sync(() -> {
             player.teleport(pair.getKey(), PlayerTeleportEvent.TeleportCause.PLUGIN);
             if (pair.getValue() != null) {
                 Audience audience = CoreBukkitAPI.getInstance().getAudienceProvider().player(player);
                 pair.getValue().show(audience);
             }
-        }
+        });
     }
 
 }