Conversation API not working

Expected behavior

The Conversation API working correctly.

Observed/Actual behavior

This bug already has been reported under: https://github.com/PaperMC/Folia/issues/24

After nearly a year I'd like to ask if there are any news regarding the broken Conversation API of Folia. Beginning a new conversation with a player results in the chat being broken. No message can be send anymore upon restarting the server.

[17:40:57 ERROR]: Chain link failed, continuing to next one
java.lang.UnsupportedOperationException: null
        at net.minecraft.server.network.ServerGamePacketListenerImpl.broadcastChatMessage(ServerGamePacketListenerImpl.java:2492) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChat$13(ServerGamePacketListenerImpl.java:2221) ~[?:?]
        at net.minecraft.util.FutureChain.lambda$append$1(FutureChain.java:27) ~[folia-1.20.4.jar:git-Folia-"25ee657"]
        at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
        at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]

Steps/models to reproduce

Player player = getPlayer();

player.beginConversation(new Conversation(SimplePlugin.getInstance(), player, new ValidatingPrompt() {

	@Override
	public String getPromptText(ConversationContext context) {
		context.getForWhom().sendRawMessage("Dopice");

		return "Type anything";
	}

	@Override
	protected boolean isInputValid(ConversationContext context, String input) {
		return false;
	}

	@Override
	protected Prompt acceptValidatedInput(ConversationContext context, String input) {
		return Prompt.END_OF_CONVERSATION;
	}
}));

Plugin and Datapack List

No plugins are installed except mine which uses the Conversation API.

Folia version

This server is running Folia version git-Folia-"25ee657" (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: 25ee657)

Other

No response

Start by reading the earlier report in Folia issue #24 and reproduce the Conversation API example from this issue on Folia 1.20.4. Trace the chat failure from ServerGamePacketListenerImpl.broadcastChatMessage and the UnsupportedOperationException. Done means a player can begin a conversation, send input, and continue chatting without the reported failure.