Erroneous lock of the locus screen
1. Launch Locus
2. Enable or check the settings-Control-Screen-Screen Unlock-enabled
3. Turn off the screen with the power button.
4. Turn on the screen with the power button. The screen should turn on, but access to other applications will be blocked.
5. Select any track and enable "track navigation".
The screen starts to quickly switch between the "Locus Screen" and "Graphic Key Input Screen" states. This will continue indefinitely.