GameResources and GameObjectSystems are loaded multiple times while opening a project.

[badandbest]

Describe the bug

Game resources and game object systems load multiple times when you are opening a project.

To Reproduce

1. Create a GameObjectSystem and GameResource

   public class MyGameSystem : GameObjectSystem
   {
       public MyGameSystem( Scene scene ) : base( scene )
       {
               Listen( Stage.FinishUpdate, 10, DoSomething, "DoingSomething" );
       }
   
       void DoSomething()
       {
   	    Log.Info( $"Did something!" );
   
   	    // Only run once.
   	    Dispose();
       }
   }
   

   [GameResource("My Game Resource", "test", "A game resource for testing.")]
   public class MyGameResource : GameResource
   {
       protected override void PostLoad()
       {
   	    Log.Info( $"Loaded {this}" );
       }
   }
   

2. Open your project

3. They are loaded/created twice.

4. Note that this is before I clicked play on the scene.

Expected behavior

A game resource should only be loaded once.

A game object system should only be created once per scene.

Media/Files

Log.log

Project.zip

Additional context

No response