First scene loads and immediately disappears...

First scene loads and immediately disappears, to be replaced by the second scene. The first scene is currently not much more than a placeholder. Under what circumstances would this happen?

When you have a script in the first scene that is loading the second scene.

I do, but it is attached to a Next button.

Maybe use Debug.Log to find out if that function is running, and if it is, start investigating why.

Thanks, I’ll try that.

Yes, you were right. It was in a Start function, which executed immediately.