Sounds similar to what happens when apple adds functionality an app used to provide.
At least you are not in the situation where they took an MIT licensed project of yours, brought in a few functions, and because you made the project and your app uses it--but it is now considered internal API, your next app submissions are declined.
At least you are not in the situation where they took an MIT licensed project of yours, brought in a few functions, and because you made the project and your app uses it--but it is now considered internal API, your next app submissions are declined.