Entities Managed In Screens Draw Over Screen Transitions

[nek0d3r]

If you generate an ECS world inside of a screen, drawing systems seem to always draw after screen transitions, causing entities to appear over top of the transition animation.

Minimal reproduction:

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MonoGame.Extended;
using MonoGame.Extended.ECS;
using MonoGame.Extended.ECS.Systems;
using MonoGame.Extended.Screens;
using MonoGame.Extended.Screens.Transitions;

namespace Sample;

public class SampleScreen(Game game) : GameScreen(game)
{
    private World _world;
    public override void Initialize()
    {
        _world = new WorldBuilder().AddSystem(new SampleSystem(new SpriteBatch(GraphicsDevice))).Build();
        Game.Components.Add(_world);
        base.Initialize();
    }
    public override void Update(GameTime gameTime) { }
    public override void Draw(GameTime gameTime) { }
}

public class SampleSystem(SpriteBatch spriteBatch) : DrawSystem
{
    private readonly SpriteBatch _spriteBatch = spriteBatch;
    public override void Draw(GameTime gameTime)
    {
        _spriteBatch.Begin();
        _spriteBatch.FillRectangle(new RectangleF(100, 100, 100, 100), Color.Orange);
        _spriteBatch.End();
    }
}

public class Game1 : Game
{
    private GraphicsDeviceManager _graphics;
    private ScreenManager _screenManager;

    public Game1() { _graphics = new GraphicsDeviceManager(this); }

    protected override void Initialize()
    {
        base.Initialize();
    }

    protected override void LoadContent()
    {
        _screenManager = new ScreenManager();
        Components.Add(_screenManager);
        _screenManager.LoadScreen(new SampleScreen(this), new ExpandTransition(GraphicsDevice, Color.Black, 5f));
    }

    protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); base.Draw(gameTime);}
}