So this time only one bug was reported:
The thing is that I’m using MVVM Light and I made the mistake to just set one complete ViewModel object(inherits from MVVMLight.ViewModelBase) during a tombstone operation.
The issue is that the ViewModelBase parameterless contructor is protected… Then this failure happened. Taking a look on the web, this issue might be solved on next MVVM releases.
OK. In the end was my mistake to just save a complete viewModel to the phone state. Now it is fixed… I just submitted the app few minutes ago.
Let’s wait and see what comes next…