Is there a limit in drawn objects?

Hello to everyone,
       I'm experiencing a very annoying matter in my game editor. I created a form and when the user adds an object to the editor the object is drawn. But the problem is that sometimes I press to add the object and is not drawn and other times it is drawn but the previous one is missing.... Could anyone give me a tip??

Here's my draw code :

 GraphicsDevice.Clear(Color.Beige);
                   
                    spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.BackToFront, SaveStateMode.SaveState);
                   
                    // Draws all the objects
                    //?????????????????????????
                    if (avatar_pressed == true)
                    {
                        avatar.Draw(spriteBatch);
                    }


                    foreach (Obstacle obstacle in obstacles)
                    {
                        obstacle.Draw(spriteBatch);
                    }
               
                    foreach (Tiles tile in tiles)
                    {
                        tile.Draw(spriteBatch);
                    }


                    if (back_selected == true)
                    {
                        background.Draw(spriteBatch);
                    }


                    spriteBatch.End();