If 'USB Debugging' feature is activated on your device, you may encounter the error message "Disconnected due to detected abnormal behaviors" when opening the beta test app.
Please kindly deactivate 'USB Debugging' feature on your device by following steps below, and then reopen the app;
1. Access "Settings" on your device
2. Choose the menu "Developer Options"
3. Tap the 'USB Debugging' button to deactivate it