Realm Sync - SubscribeForNotifications doesn't work on a background thread

MongoDB Atlas App Services & Realm Atlas Device Sync
,
3

Hi Andrea.
The UI thread lags because in cases that there is no internet connection I need to use the synchronous GetInstance() to open the realm as the GetInstanceAsync() method doesn’t work offline. My _realmService.GetInstanceAsync() is as follows:

public async Task<Realm> GetInstanceAsync()
{
    try
    {
        SyncConfiguration config = new SyncConfiguration("Scribetech", _realmUser);
        return Connectivity.NetworkAccess == NetworkAccess.Internet ? await Realm.GetInstanceAsync(config) : Realm.GetInstance(config);
    }
    catch (Exception ex)
    {
        if (ex.InnerException != null)
        {
            Debug.WriteLine("RealmService.GetInstanceAsync: " + ex.InnerException.Message);
        }
        else
        {
            Debug.WriteLine("RealmService.GetInstanceAsync: " + ex.Message);
        }                
        return null;
    }
}

I call the ListenForRealmChanges when I log in, from a command as follows:

public Command LoginCommand
{
    get
    {
        return new Command(async () => {

            <!-- Logic for signing in the user --!>

            await _updaterService.ListenForRealmChanges();
    });
}

I thought the point of the AsyncContext was to enable the realm to run on the background? I haven’t been able to find any examples of it being used with realm so I have previously tried wrapping the ListenForRealmChanges method in an AsyncContext but that doesn’t seem to do anything.