OnUserStatsReceived getting wrong appid

[Sambo3975]

Describe the bug
I know that SteamUserStats.OnUserStatsReceived callbacks can pick up responses for other Steam apps. That's not the issue that I'm having. When I receive a callback, the appID received never matches my game's appID, even if the stats I received are the ones for my game.

To Reproduce
Steps to reproduce the behavior:

1. Call SteamClient.Init(my_app_id)
2. Add a callback to SteamUserStats.OnUserStatsReceived
3. Call SteamUserStats.GetCurrentStats()
4. When the callback is received, appID is always different from my game's appID, even for a response that is clearly for my game (Achievements match the ones I defined on the Steam partner page).

Calling Code

    // GameControllerSpawner.Awake
    void Awake()
    {
        // Attempt to connect to Steam
        try
        {
            SteamClient.Init(2258130);
            Debug.Log("Successfully connected to Steam client.");
            GameController.steamClientInitialized = true;
        }
        catch (Exception e)
        {
            Debug.Log($"Could not connect to Steam client: {e.Message}");
        }

        // Spawn the Game Controller
        if (GameController.Instance == null)
            Instantiate(gameController);

        Destroy(gameObject);
    }

    // GameController.Awake
    void Awake()
    {
        // ... Irrelevant other initialization code ...

        if (steamClientInitialized)
        {
            Debug.Log("Requesting Steam user stats.");
            SteamUserStats.OnUserStatsReceived += OnUserStatsReceived;
            SteamUserStats.RequestCurrentStats();
        }
    }

    // GameController.OnUserStatsReceived
    public void OnUserStatsReceived(SteamId appID, Result result)
    {
        Debug.Log($"Received stats for appid {appID.Value}; result = {result}");

        // if (appID.Value != SteamClient.AppId.Value) // Ignore stats received for other Steam apps.
        //     return;
        
        if (result != Result.OK) // Make sure query was successful.
        {
            Debug.LogWarning($"Failed to get user stats with status {result}.");
            return;
        }

        Debug.Log("Received Steam user stats.");

        var builder = new StringBuilder("The following achievements are available:");
        foreach (var ach in SteamUserStats.Achievements)
            builder.Append($"\n{ach.Name}");
        Debug.Log(builder.ToString());
    }

Expected behavior
Callback for my game's stats has an appID that matches the appID of my game.

Desktop (please complete the following information):

• OS: Linux Mint 21.3 Cinnamon
• Unity: 2021.3.33f1