We recommend downloading this material and going through it offline (turn off the Internet and mobile communication, turn on airplane mode). The app will update the results automatically when the internet is turned on again.
It is also possible that the administrator uses a "strict" testing mode. This means that with any activity other than the test itself (switching to another application, incoming call, etc.), it is automatically terminated.
Before starting the test with the "strict" mode, you will see a pop-up window with a notification that any activity will lead to the end of the test.