How can I get the latest position information?

Information is not updated when trying to retrieve information immediately after closing a position.

I have a position at the same time as the cBot start with the code below, and immediately after modifying the position, why does the information on Quantity not match the modified Quantity when I get the information on Quantity?

Please let me know if anyone can figure this out.

Best regards.

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class NewcBot : Robot
    {

        private string _symbol;
        private double quantity;

        protected override void OnStart()
        {
            _symbol = Chart.SymbolName;

            ExecuteMarketOrder(TradeType.Sell, _symbol, 4000);

            var positionsell = Positions.FindAll(null, _symbol, TradeType.Sell);
            foreach (Position p in positionsell)
            {
                foreach (var Position in positionsell)
                {
                    if (Position.Id == p.Id)
                    {
                        ModifyPositionAsync(Position, 1000);
                    }
                }
            }

            var positionsell2 = Positions.FindAll(null, _symbol, TradeType.Sell);
            foreach (Position q in positionsell2)
            {
                quantity += q.Quantity;
            }
            Chart.DrawStaticText("test", quantity.ToString(), VerticalAlignment.Bottom, HorizontalAlignment.Center, Color.White);
        }

        protected override void OnTick()
        {
        }

        protected override void OnStop()
        {
        }
    }
}