Slow HttpClient responses

options.AddCocApiHttpClients(
    builder: builder => builder
        .AddRetryPolicy(context.Configuration.GetValue<int>("CocApi:Rest:HttpClient:Retries")) // 1
        .AddTimeoutPolicy(TimeSpan.FromMilliseconds(context.Configuration.GetValue<long>("CocApi:Rest:HttpClient:Timeout"))) // 1.5 seconds
        .AddCircuitBreakerPolicy(
            context.Configuration.GetValue<int>("CocApi:Rest:HttpClient:HandledEventsAllowedBeforeBreaking"), // 20
            TimeSpan.FromSeconds(context.Configuration.GetValue<int>("CocApi:Rest:HttpClient:DurationOfBreak"))) // 30 seconds
        .ConfigurePrimaryHttpMessageHandler(sp => new HttpClientHandler
        {
            // this property is important if you query the api very fast
            MaxConnectionsPerServer = context.Configuration.GetValue<int>("CocApi:Rest:HttpClient:MaxConnectionsPerServer"), // 100
            CookieContainer = sp.GetRequiredService<CookieContainer>().Value
        })
);

DateTime requestedAtLocalVar = DateTime.UtcNow;

using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
{
    string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);

    ....