[1.15.1] client capability is not present after death

[transfarmer]

I am trying to update a capability on player death. I use PlayerEvent.Clone and check if isWasDeath() to send a packet to the client to update that capability. My Clone event handler first copies the original PlayerEntity's capability values to the PlayerEntity in the logical server and then sends a packet to the client, which uses Minecraft#player. The server-side capability is updated without issues, but it is not even present in the client. Both sides use LazyOptional<X>#ifPresent.

links: Clone event handler, client packet

Why does this occur?

 

edit: reconnecting to a server results in the capabilty being properly synchronized

Spoiler

[18:03:12] [Server thread/INFO] [adventureitems/]: both capabilities are present on the server side
[18:03:12] [Render thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Client
java.lang.IllegalStateException: capability does not exist
	at transfarmer.adventureitems.network.ClientWeaponData.lambda$clientHandle$2(ClientWeaponData.java:60) ~[main/:?] {re:classloading}
	at net.minecraftforge.common.util.LazyOptional.orElseThrow(LazyOptional.java:261) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at transfarmer.adventureitems.network.ClientWeaponData.clientHandle(ClientWeaponData.java:60) ~[main/:?] {re:classloading}
	at net.minecraftforge.fml.DistExecutor.runWhenOn(DistExecutor.java:56) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at transfarmer.adventureitems.network.ClientWeaponData.handle(ClientWeaponData.java:43) ~[main/:?] {re:classloading}
	at net.minecraftforge.fml.network.simple.IndexedMessageCodec.lambda$tryDecode$3(IndexedMessageCodec.java:124) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_232] {}
	at net.minecraftforge.fml.network.simple.IndexedMessageCodec.tryDecode(IndexedMessageCodec.java:124) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraftforge.fml.network.simple.IndexedMessageCodec.consume(IndexedMessageCodec.java:157) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraftforge.fml.network.simple.SimpleChannel.networkEventListener(SimpleChannel.java:79) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:212) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
	at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:204) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
	at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
	at net.minecraftforge.fml.network.NetworkInstance.dispatch(NetworkInstance.java:84) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraftforge.fml.network.NetworkHooks.lambda$onCustomPayload$0(NetworkHooks.java:74) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_232] {}
	at net.minecraftforge.fml.network.NetworkHooks.onCustomPayload(NetworkHooks.java:74) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraft.client.network.play.ClientPlayNetHandler.handleCustomPayload(ClientPlayNetHandler.java:1868) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.network.play.server.SCustomPayloadPlayPacket.processPacket(SCustomPayloadPlayPacket.java:59) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraft.network.play.server.SCustomPayloadPlayPacket.processPacket(SCustomPayloadPlayPacket.java:11) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraft.network.PacketThreadUtil.func_225383_a(SourceFile:21) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.run(SourceFile:144) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.concurrent.RecursiveEventLoop.run(SourceFile:23) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(SourceFile:118) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.drainTasks(SourceFile:103) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:855) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:520) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(SourceFile:202) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_232] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_232] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_232] {}
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_232] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) ~[forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:101) [forge-1.15.1-30.0.41_mapped_snapshot_20200115-1.14.3.jar:?] {}

 

 

Edited January 20, 2020 by transfarmer