Bug Prefab reference sometimes disappears when playing and always when loading a scene.

Code (CSharp):

1. [HideInInspector] public Projectile projectilePrefab;

This is the line I have in my Scriptable Object class.

I assign it in a custom inspector, where I make sure to set the SO dirty and all.
Most of the time when I hit play on the game, the references stay, but on scene loads they always disappear.

Using Unity 2021.3.15f

 

I would first open the scriptable object in a text editor to make sure the values are properly being serialised out. If they aren't, that points to your issue being the custom editor.

 

I've narrowed the cause down to loading save files with a saving asset that I use, just gotta ask the creator of it about it I guess