c# winforms rectangle drawn not show on first time. how to solve?

int count = 0;
private void pictureBoxImageToCrop_MouseUp(object sender, MouseEventArgs e)
{
    if (e.Button != MouseButtons.Left || crop == false) return;

    if (DrawingRects.Count > 0 && pictureBoxImageToCrop.Image != null && selectedPath != "")
    {
        if ((x >= 0 && x <= pictureBoxImageToCrop.Image.Size.Width) && (y >= 0 && y <= pictureBoxImageToCrop.Image.Size.Height))
        {
            var dr = DrawingRects.Last();
            if (dr.Rect.Width > 0 && dr.Rect.Height > 0)
            {
                rectImage = cropAtRect((Bitmap)pictureBoxImageToCrop.Image, dr.Rect);

                if (saveRectangles)
                {
                    count++;
                    rectangleName = GetNextName(Path.Combine(selectedPath, "Rectangle"), ".bmp");
                    FileList.Add($"{dr.Location}, {dr.Size}", rectangleName);
                    string json = JsonConvert.SerializeObject(
                        FileList,
                        Formatting.Indented
                    );
                    using (StreamWriter sw = new StreamWriter(Path.Combine(selectedPath, "rectangles.txt"), false))
                    {
                        sw.WriteLine("Total number of rectangles: " + count + Environment.NewLine);
                        sw.Write(json);
                        sw.Close();
                    }

                    rectImage.Save(rectangleName);
                    saveRectanglesCounter++;
                }
                else
                {
                    var stream = ToMemoryStream(rectImage);
                    var image = System.Drawing.Image.FromStream(stream);
                    pictureBoxCroppedImages.Image = image;
                }

                // Here I added an additional check to make sure the Image is set in pictureBoxCroppedImages
                if (saveRectangles && pictureBoxCroppedImages.Image == null)
                {
                    pictureBoxCroppedImages.Image = rectImage;
                }

                pixelsCounter = rect.Width * rect.Height;
                pictureBoxCroppedImages.Invalidate();

                var newKey = $"{dr.Location}, {dr.Size}";
                var newItem = new MyListBoxItem
                {
                    Message = newKey + "," + FileList[newKey],
                    ItemColor = Color.Green
                };
                MyItems.Add(newItem);
                listBoxCroppedImages.SelectedIndex = MyItems.Count - 1;

                pictureBoxImageToCrop.Focus();

                // Check if the image is null before using it
                if (pictureBoxCroppedImages.Image != null)
                {
                    Graphics g = Graphics.FromImage(this.pictureBoxCroppedImages.Image);
                    g.Clear(this.pictureBoxCroppedImages.BackColor);
                }
            }
        }
        else
        {
            if (clearRectangles)
            {
                DrawingRects.Clear();
                pictureBoxImageToCrop.Invalidate();
            }

            x = 0;
            y = 0;
        }
    }
}