Subscription to Positions.Closed event sometimes misses the event

Dear Spotware,

I subscribed a simple logic to Positions.Closed event to track account balance inside the cBot.

protected override void OnStart(){ Positions.Closed += TRD.Positions_Closed;}

public void Positions_Closed(PositionClosedEventArgs e)
        {
            ClosePosition(e.Position, e.Reason);
        }

public void ClosePosition(Position p, PositionCloseReason reason)
        {
            blnce += p.NetProfit;
            if (blnce < mnb)
            {
                mnb = blnce;

                //Нужно проверять относительно начального баланса
                double ddCsh = mxb - mnb;
                double _dd = ddCsh / initBalance;
                
                if (_dd > dd) dd = _dd;
            }
            else if (blnce > mxb)
            {
                mxb = blnce;
                mnb = blnce;
            }
        }

And then I check if balance of backtester is different from the balance that I keep in cBot.

protected override void OnTick()
        {
            if (check && Math.Round(Account.Balance, 1) != Math.Round(TRD.blnce, 1))
            {
                Print("Account {0}.     TRD {1}.    Dif {2}", Math.Round(Account.Balance, 1), Math.Round(TRD.blnce, 1), Math.Round(Account.Balance, 1) - Math.Round(TRD.blnce, 1));
                Stop();
            }

            //allow 1 tick to pass to make sure that events and Account.Balance to be updated

            check = Math.Round(Account.Balance, 1) != Math.Round(TRD.blnce, 1);
        }

Every new start of cBot gives the balance difference in different place. This is not due to lagging of Account.Balance update or event subscription to occur. If I remove Stop(); then cumulative difference is big.

Is it a bug of Positions.Closed event subscription, or Account.Balance is calculated wrongly in backtester ?

I tried on both 4.1 and 4.2.22 versions.