Same bug as listed in Minecraft MC-34686 ...
12:57:09 PM CONSOLE: [INFO] cosmicWavez [/68.230.61.253:40908] lost connection: Internal Exception: io.netty.handler.codec.DecoderException: java.io.IOException: Bad packet id 81 12:57:28 PM CONSOLE: [INFO] cosmicWavez [/68.230.61.253:38173] lost connection: Internal Exception: io.netty.handler.codec.DecoderException: java.io.IOException: Bad packet id 11508
etc etc for the different players including myself trying to get onto my own server.