When i try to grab a backpack from the creative menu i get kicked out of the server and the server console get's this error. anyone a idea? can't find anything related to this no clue where to go from here.

io.netty.handler.codec.DecoderException: java.io.IOException: Packet 0/27 (CPacketCreativeInventoryAction) was larger than I expected, found 4 bytes extra whilst reading packet 27
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442) ~[ByteToMessageDecoder.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:375) ~[ByteToMessageDecoder.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:342) ~[ByteToMessageDecoder.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) ~[ByteToMessageDecoder.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [AbstractChannelHandlerContext.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:360) [ByteToMessageDecoder.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) [ByteToMessageDecoder.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [AbstractChannelHandlerContext.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:360) [ByteToMessageDecoder.class:?]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) [ByteToMessageDecoder.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75) [ChannelInboundHandlerAdapter.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75) [ChannelInboundHandlerAdapter.class:?]
at io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:278) [IdleStateHandler.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1329) [DefaultChannelPipeline$HeadContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [AbstractChannelHandlerContext.class:?]
at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:908) [DefaultChannelPipeline.class:?]
at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:744) [AbstractChannel$AbstractUnsafe$7.class:?]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [AbstractEventExecutor.class:?]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) [SingleThreadEventExecutor.class:?]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:304) [EpollEventLoop.class:?]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [SingleThreadEventExecutor$5.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]

Not experiencing this issue