SpigotCore_Main/src/com/comphenix/tinyprotocol/TinyProtocol.java

@@ -123,7 +123,10 @@ public class TinyProtocol implements Listener {
 		private PacketInterceptor(Player player) {
 			this.player = player;
 
-			channel = getChannel.get(connections.stream().filter(connection -> player.getUniqueId().equals(getUUID.get(connection))).findAny().orElseThrow(() -> new SecurityException("Could not find channel for player " + player.getName())));
+			channel = getChannel.get(connections.stream().filter(connection -> player.getUniqueId().equals(getUUID.get(connection))).findAny().orElseThrow(() -> {
+				player.kickPlayer("An injection failure happend.");
+				return new SecurityException("Could not find channel for player " + player.getName());
+			}));
 
 			synchronized (playerInterceptors) {
 				playerInterceptors.put(player, this);