Discrepancy once the app is deployed on mobile.

I have a dropdown in my main menu UI which I populate with data from a scriptable object and from data on disk.

The first time it launches I should get only one item in it and it works well in the editor.

The thing is when I deploy to my mobile device (table), there is nothing in the dropdown.

Why? What? And how to fix this?

OK found the issue.

In the build settings, there were two deleted scenes and only them (I had merged them into one).

What is strange is that my main scene was still included in the build and launched with no problem apart from the missing element in the dropdown.

Another mystery to add to the pile I guess…