I’m on iOS7. when I open the app, and it displays the projects, the background image shows for a split second and then becomes a black screen. I can still see and interact with all the projects. it’s just the background image that stops displaying correctly.
maybe you are short of memory? When i scroll in my projects, after say, 3 screens, i loose the background image too (get a green background though)
i’ve just update to 2.3 and now after i close a project main app background goes black for me too!
I’m on iOS 8 and it works fine for me.