when pickblocking a block, the server crashes due to io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:set_player_inventory' if the block the player pickblocks is in their inventory. this happens on single player as well.

how to replicate bug:

1. Put any block in the player inventory in survival mode
2. pick block the same type of block

demonstration of bug:

https://drive.google.com/file/d/1Id1FKlQtB_QbitWgMkmZ03GOoLqZ-XfS/view?usp=drive_link

relevant stack trace from log file:
[13:19:30] Netty Server IO #1/ERROR: Error sending packet clientbound/minecraft:set_player_inventory
io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:set_player_inventory'
    at za.a(SourceFile:55) ~[24w33a.jar:?]
    at za.encode(SourceFile:14) ~[24w33a.jar:?]
    at wi.a(SourceFile:26) ~[24w33a.jar:?]
    at wi.encode(SourceFile:12) ~[24w33a.jar:?]
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ~[netty-codec-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:113) ~[netty-codec-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.ChannelOutboundHandlerAdapter.write(ChannelOutboundHandlerAdapter.java:113) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at vx$2.write(SourceFile:530) ~[24w33a.jar:?]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:940) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:966) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:934) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:984) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1025) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:306) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at vx.c(SourceFile:350) ~[24w33a.jar:?]
    at vx.d(SourceFile:345) ~[24w33a.jar:?]
    at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
    at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: io.netty.handler.codec.EncoderException: Empty ItemStack not allowed
    at cvl$2.a(SourceFile:176) ~[24w33a.jar:?]
    at cvl$2.encode(SourceFile:163) ~[24w33a.jar:?]
    at zb$12.encode(SourceFile:157) ~[24w33a.jar:?]
    at zb$9.a(SourceFile:97) ~[24w33a.jar:?]
    at zb$9.encode(SourceFile:87) ~[24w33a.jar:?]
    at za.a(SourceFile:53) ~[24w33a.jar:?]
    ... 31 more

based on this, it looks like there is something causing an ItemStack object to be set as empty as the parameter of a function.