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Can't move on vanilla servers #1482

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Can't move on vanilla servers#1482
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type: bugSomething isn't working

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@LoboMetalurgico
LoboMetalurgico
opened on Aug 18, 2026

Description

I have a modded server integrated into my network, and we recently added Sable/Create Aeronautics to it. After this addition, I noticed that we can't "walk" in the lobby (vanilla paper server). In the client log, there are a ton of OutOfBoundException errors for various packets, but in this case, the problem associated with Sable is in the packet "clientbound/minecraft:move_entity_pos".

[17Aug2026 23:29:46.478] [Netty Client IO #4/ERROR] [be_quiet_negotiator/]: Error decoding packet:
io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:move_entity_pos'
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.IdDispatchCodec.decode(IdDispatchCodec.java:38) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.IdDispatchCodec.decode(IdDispatchCodec.java:14) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.PacketDecoder.handler$did000$be_quiet_negotiator$decode(PacketDecoder.java:545) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.PacketDecoder.decode(PacketDecoder.java) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.handler@4.1.97.Final/io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:202) ~[netty-handler-4.1.97.Final.jar%23140!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.handler@4.1.97.Final/io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:164) ~[netty-handler-4.1.97.Final.jar%23140!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:333) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:454) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.codec@4.1.97.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.97.Final.jar%23138!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.handler@4.1.97.Final/io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[netty-handler-4.1.97.Final.jar%23140!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.transport@4.1.97.Final/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.97.Final.jar%23144!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.common@4.1.97.Final/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar%23139!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.common@4.1.97.Final/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar%23139!/:4.1.97.Final]
	at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(9) + length(1) exceeds writerIndex(9): PooledUnsafeDirectByteBuf(ridx: 9, widx: 9, cap: 9)
	at MC-BOOTSTRAP/io.netty.buffer@4.1.97.Final/io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1442) ~[netty-buffer-4.1.97.Final.jar%23137!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.buffer@4.1.97.Final/io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:730) ~[netty-buffer-4.1.97.Final.jar%23137!/:4.1.97.Final]
	at MC-BOOTSTRAP/io.netty.buffer@4.1.97.Final/io.netty.buffer.AbstractByteBuf.readBoolean(AbstractByteBuf.java:739) ~[netty-buffer-4.1.97.Final.jar%23137!/:4.1.97.Final]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.FriendlyByteBuf.readBoolean(FriendlyByteBuf.java:1105) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.protocol.game.ClientboundMoveEntityPacket$Pos.handler$ilc000$sable$readActuallyInSubLevel(ClientboundMoveEntityPacket.java:538) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.protocol.game.ClientboundMoveEntityPacket$Pos.read(ClientboundMoveEntityPacket.java:75) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.StreamCodec$2.decode(StreamCodec.java:37) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.StreamCodec$5.decode(StreamCodec.java:91) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.StreamCodec$5.decode(StreamCodec.java:87) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.codec.IdDispatchCodec.decode(IdDispatchCodec.java:36) ~[client-1.21.1-20240808.144430-srg.jar%23589!/:?]
	... 46 more

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