[Zubersoft]

What kind of keyboard are you using? It would help to know that. I haven't made any changes to the MIDI functionality on iOS (it's all going through coreMIDI) other than adding an new setting to reset the network MIDI session for users that need that. So for it to suddenly stop working for you is incredibly strange. I would be very curious to hear if backing up your library (Settings->Backup and Restore->Backup Library), uninstalling, reinstalling and restoring your library backup resolves the issue. The fact that you have some things working and not others makes it hard to identify where the problem might be. If you go to Settings->MIDI Settings->Configure MIDI Connection, can you verify that both the input and output ports are checked for your keyboard?

Thanks,
Mike