We have an app that is published both on iOS and macOS (Catalyst).
Now, the iOS app is sharing group containers between app extension and main app target, but it's not sandboxed.
The macOS Catalyst app is sandboxed but the group containers were removed a week ago with the latest AppStore submission.
We are facing the same issue and still seeing the error message saying "You can only transfer sandboxed apps that are not sharing a group container." when transferring the app.
It's not clear why we are having that message as the group containers were removed from the macOS app.
Can anyone from Apple give a bit more details what can we do to fix that?