Random disconnect when going from server to server/island in skyblock

[Rasnama]

This has been happening constantly, It's the same error every time with no real difference through my testing, i'm not sure exactly what's causing it, i'm using this mod in conjunction with Optifine for a different resource pack, that is the only real difference.

[14:03:42] [Netty Client IO #15/ERROR]: NetworkDispatcher exception
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.read0(Native Method) ~[?:1.8.0_51]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43) ~[?:1.8.0_51]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.8.0_51]
at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.8.0_51]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[?:1.8.0_51]
at io.netty.buffer.UnpooledUnsafeDirectByteBuf.setBytes(UnpooledUnsafeDirectByteBuf.java:446) ~[UnpooledUnsafeDirectByteBuf.class:4.0.23.Final]
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:881) ~[AbstractByteBuf.class:4.0.23.Final]
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:225) ~[NioSocketChannel.class:4.0.23.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119) [AbstractNioByteChannel$NioByteUnsafe.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) [NioEventLoop.class:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [SingleThreadEventExecutor$2.class:4.0.23.Final]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[14:03:42] [Netty Client IO #15/INFO]: [SkyblockAddons/SkyblockAddons/NetworkListener] Detected leaving skyblock!