2DSpaceShooter playing single player as host causes exceptions

[hk1ll3r]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. enter play mode for "network" scene in editor
2. shoot a few asteroids

Expected behavior
Be able to play the game without exceptions

Screenshots
N/A

Environment (please complete the following information):

• OS: Windows 10
• Unity Version: 2020.3.13f1
• MLAPI Version: [e.g. v0.1.0]
• Bitesize Samples Repository Version/Commit: 3dc3c39

Additional context
It seems that IsSpawned returns false in case of local host causing the issues.
Astroid's counts seems to be off as well.
Probably a lot of other things are going wrong as well if I ignore the exception and keep playing, I get many other types of exceptions...

[LukeStampfli]

Could you provide a screenshot of the exceptions you are getting? I cannot reproduce this and don't get any exceptions if I run it on my machine.

[hk1ll3r]

You've got to run the game in editor, host and play single player. It always happens to me in under a minute.
My first theory is when two bullets hit the same astroid (or ship and a bullet) this happens but I could be wrong.
Second theory is "IsSpawned" returns false if there are no clients, but that seems like a big bug so ...

screenshot: https://imgur.com/6Q8GDPJ

Stack trace:
SpawnStateException: Object is not spawned
MLAPI.Spawning.NetworkSpawnManager.DespawnObject (MLAPI.NetworkObject networkObject, System.Boolean destroyObject) (at Library/PackageCache/com.unity.multiplayer.mlapi@3e3aef6aa0/Runtime/Spawning/NetworkSpawnManager.cs:528)
MLAPI.NetworkObject.Despawn (System.Boolean destroy) (at Library/PackageCache/com.unity.multiplayer.mlapi@3e3aef6aa0/Runtime/Core/NetworkObject.cs:433)
Asteroid.Explode () (at Assets/Scripts/Asteroid.cs:64)
Bullet.OnCollisionEnter2D (UnityEngine.Collision2D other) (at Assets/Scripts/Bullet.cs:57)

[LPLafontaineB]

Hi @hk1ll3r , I managed to reproduce this bug with commit 3dc3c39 but not in the most recent branches. Seems like this was an old NGO bug that has been fixed since then.