C＃进入处置关闭。 IDE忽略[InstantHandle]属性

Question

即使为Access to disposed closure / [InstantHandle]设置了Action属性，我也收到了警告Func。 我的IDE warning screenshot with code和Resharper settings。

如果重写为同步版本（使用Wait()执行任务），也会出现问题。

版本：
目标.NET Framework ：4.6.2
Visual Studio ：2017 Enterprise, 15.6.6
ReSharper ：2018.1

// Nuget package
using JetBrains.Annotations;

public static void SendMessageAsync(string message)
{
    Task.Factory.StartNew(async () => {
        var form = new FormUrlEncodedContent(new[] {
            new KeyValuePair<string, string>("chat_id", "1"),
            new KeyValuePair<string, string>("message", message),
        });

        await ForTryAsync(nameof(SendMessageAsync), async () => {
            using (var resp = await Http.PostAsync("/sendMessage", form))
                resp.EnsureSuccessStatusCode();
        }, false);

        form.Dispose();
    });
}

public static async Task ForTryAsync(string methodName, [InstantHandle] Func<Task> action)
{
    Exception innerException = null;

    for (int i = 0; i < 5; i++)
    {
        try
        {
            await action();
            return;
        }
        catch (Exception ex)
        {
            innerException = ex;
            // Some error handling here
        }
    }

    throw new Exception($"Method \"{methodName}\" failed after 5 retries. Last error: ${innerException?.Message}", innerException);
}

谢谢。