--- a/net/minecraft/server/PlayerConnectionUtils.java +++ b/net/minecraft/server/PlayerConnectionUtils.java @@ -9,6 +9,7 @@ public static <T extends PacketListener> void ensureMainThread(Packet<T> packet, T t0, IAsyncTaskHandler<?> iasynctaskhandler) throws CancelledPacketHandleException { if (!iasynctaskhandler.isMainThread()) { iasynctaskhandler.execute(() -> { + if (t0 instanceof PlayerConnection && ((PlayerConnection) t0).processedDisconnect) return; // CraftBukkit packet.a(t0); }); throw CancelledPacketHandleException.INSTANCE;