This happens when one or two interview responses haven't been captured or saved properly. This is the systems way of taking you back to ensure you can jump back to where you left off where on your last saved response. You can return to your interview invitation and re-enter and it will bring you back to your last saved response so you can pick up where you left off and continue to complete. Be sure that you are not running multiple apps simultaneously to avoid app confusion. Close all other apps before returning to your interview invitation and restarting.