Ignore plugin messages from disconnected players

common/src/main/java/us/ajg0702/queue/common/EventHandlerImpl.java

@@ -30,6 +30,7 @@ public class EventHandlerImpl implements EventHandler {
 
     @Override
     public void handleMessage(AdaptedPlayer receivingPlayer, byte[] data) {
+        if(!receivingPlayer.isConnected()) return;
         if(communicationManager == null) {
             communicationManager = new CommunicationManager(main);
         }

common/src/main/java/us/ajg0702/queue/common/communication/CommunicationManager.java

@@ -51,6 +51,7 @@ public class CommunicationManager {
         ComResponse response = handler.handleMessage(receivingPlayer, in.readUTF());
 
         if(response == null) return;
+        if(!receivingPlayer.isConnected()) return;
 
         main.getPlatformMethods().sendPluginMessage(
                 receivingPlayer,