Today, some of my classes took an exam and I scanned their tickets right after. At first, the app notified that I needed to check my connection but the connection was OK. I kept scanning all the quizzes. After I logged into the website and tried to download the report, I received a warning which was: "You haven't given the quiz in this course yet." I refreshed the app, all the quiz results was there but it was unable to synchronize with the website. Then I logged out of the app and logged in again. Guess what? All the results were gone. I got that the problem was not of the connection at the beginning, but of the login issue. Please, could you fix it? It would be better if the app notified the user when they are not logged in.