Application unresponsive during backtest after adding an Indicator that uses Chart.DrawTrendLine()

cTrader Desktop for Windows v5.0.25

Steps to reproduce…

Run a large-ish backtest (small number of bars don't present this problem), for example:
Sample cBot Reference SMA with default params
EURUSD m1
Backtest range = 1/May/2024 - 16/June/2024

All fine so far

Add the Test indicator (which I've included below)

Re-run the same backtest, still all fine

Change the indicator and set ShowLines = true

Now every time you re-run the same backtest with ShowLines enabled, the application freezes for several seconds, but eventually comes back to life.

With ShowLines = false, the problem never occurs, so it appears to be related to a high-ish number of backtest bars in combination with Chart.DrawTrendLine()
 

    [Indicator(AccessRights = AccessRights.None, IsOverlay = true)]    public class Test : Indicator    {        [Parameter]        public bool ShowLines { get; set; }        [Output("Result", LineColor = "Yellow", PlotType = PlotType.Points, Thickness = 3)]        public IndicatorDataSeries Result { get; set; }        public override void Calculate(int index)        {            double result = double.NaN;                if (Bars.LowPrices[index] > Bars.HighPrices[index - 2])            {                result = (Bars.LowPrices[index]+ Bars.HighPrices[index - 2]) * 0.5;                if (ShowLines)                {                    Chart.DrawTrendLine($"FVG_U{index}", index - 2, Bars.LowPrices[index], index, Bars.LowPrices[index], Result.Line.Color, 1, LineStyle.Dots);                    Chart.DrawTrendLine($"FVG_L{index}", index - 2, Bars.HighPrices[index - 2], index, Bars.HighPrices[index - 2], Result.Line.Color, 1, LineStyle.Dots);                }            }            else if (Bars.HighPrices[index] < Bars.LowPrices[index - 2])            {                result = (Bars.LowPrices[index - 2] + Bars.HighPrices[index]) * 0.5;                if (ShowLines)                {                    Chart.DrawTrendLine($"FVG_U{index}", index - 2, Bars.LowPrices[index - 2], index, Bars.LowPrices[index - 2], Result.Line.Color, 1, LineStyle.Dots);                    Chart.DrawTrendLine($"FVG_L{index}", index - 2, Bars.HighPrices[index], index, Bars.HighPrices[index], Result.Line.Color, 1, LineStyle.Dots);                }            }                Result[index - 1] = result;        }    }