Cannot get All Threads(active and archived) from Forum Channel

[berkingurcan]

Description:
Get Active Threads methods cannot get all threads from specific Forum Channel. It gets some threads from the channel.

Expected Behavior:
Can get all active threads from guild and get all archived threads from channel.

Actual Behavior:
I have a Forum Channel which has more than 400 Threads and most of them are active. It is highly crowded server and there are too many messages threads etc.

When I try to use get_guild_active_threads and get_channel_archived_public_threads(or other related methods guild_id.get_active_threads or channel_id.get_archived_public_threads etc.) like this:

    dotenv().ok();

    // Configure the client with your Discord bot token in the environment.
    let token = env::var("DISCORD_TOKEN").expect("Expected a token in the environment");
    // ACTIVE THREAD 
    let forum_channel_id = ChannelId(FORUM_CHANNEL_ID);
    let guild_id = GuildId(GUILD_ID);

    let http = Http::new(&token);
    let mut active_threads = http.get_guild_active_threads(GUILD_ID).await.unwrap();
    println!("New active threads: {:?}", active_threads.threads.len());
    let mut archived_public_threads = http.get_channel_archived_public_threads(FORUM_CHANNEL_ID, None, None).await.unwrap();
    println!("Archived threads: {:?}", archived_public_threads.threads.len());

I get:

New active threads: 124
Archived threads: 50

But I do know that Forum Channel has more that 400 Threads. Even if I filter Guild active threads for the Forum Channel, I get around 60 threads.

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So, if the issue is Rate limit is there any method that I can use while paginating? Or am I missing something? Or any idea what is the problem?

Thank you!