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Unrecognized event: MESSAGE_REACTION_REMOVE_EMOJI

See original GitHub issue

General Troubleshooting

I have checked for similar issues.
I have updated to the latest JDA version.
I have checked the branches or the maintainers’ PRs for upcoming bug fixes.

Bug Report

After calling Message#clearReactions(String unicode) with the emote encoded as Unicode characters, I receive this error message:

2021-09-30 22:58:59.691 DEBUG 7756 --- [inWS-ReadThread] n.d.j.internal.requests.WebSocketClient  : Unrecognized event:
{"op":0,"s":40,"t":"MESSAGE_REACTION_REMOVE_EMOJI","d":{"emoji":{"name":"⬇️","id":null},"guild_id":"254236409706053632","message_id":"893240468891119636","channel_id":"259021952767754250"}}

Since the event MESSAGE_REACTION_REMOVE_EMOTE is registered here, I’d assume Discord is inconsistent with it’s event naming and MESSAGE_REACTION_REMOVE_EMOJI should be handled just like MESSAGE_REACTION_REMOVE_EMOTE. Therefore both events should be registered for processing by the same handler implementation (or this is considered a bug on discord’s side).

Expected Behavior

No error should occur and the eventhandlers should be called accordingly.

Code Example or Reproduction Steps

fun main() {
    val jda = JDABuilder
        .createDefault(token)
        .setActivity(Activity.of(Activity.ActivityType.DEFAULT, "..."))
        .setAudioPool(Executors.newScheduledThreadPool(4))
        .setAutoReconnect(true)
        .setEnableShutdownHook(true)
        .setStatus(OnlineStatus.ONLINE)
        .addEventListeners(listener)
        .build()

    jda.awaitReady()
    val slightSmileEmoji = "\uD83D\uDE42"
    val msg = jda
        .getGuildById("") // Any guild
        ?.getTextChannelById("") // Any text Channel
        ?.sendMessage("example")
        ?.complete()
    msg?.clearReactions(slightSmileEmoji)?.complete()
}

val listener = object : ListenerAdapter() {
    override fun onMessageReactionRemove(event: MessageReactionRemoveEvent) {
        LoggerFactory.getLogger("test").info("removed")
    }
}

For reproducing the method Message#clearReactions has to be called (just removing your own reaction does not work). The listener is in this example is never called.

Code for JDABuilder or DefaultShardManagerBuilder Used

JDABuilder
            .createDefault(token)
            .setActivity(Activity.of(Activity.ActivityType.DEFAULT, "..."))
            .setAudioPool(Executors.newScheduledThreadPool(4))
            .setAutoReconnect(true)
            .setEnableShutdownHook(true)
            .setStatus(OnlineStatus.ONLINE)
            .addEventListeners(*listeners.toTypedArray())
            .build()

Exception or Error

2021-09-30 22:58:59.691 DEBUG 7756 --- [inWS-ReadThread] n.d.j.internal.requests.WebSocketClient  : Unrecognized event:
{"op":0,"s":40,"t":"MESSAGE_REACTION_REMOVE_EMOJI","d":{"emoji":{"name":"⬇️","id":null},"guild_id":"254236409706053632","message_id":"893240468891119636","channel_id":"259021952767754250"}}