Kindle e-reader (Rushcliffe NG2)

Kindle Oasis 8th generation. Generally good condition with magnetic cover, battery life on KIndle plus cover battery is good, no damage to screen etc. However, when reading a book, the screen will occasionally (sometimes repeatedly) switch to the 'Your Kindle' view, where it shows Airplane mode button, Sync button, All Settings button and brightness slider. I've tried to re-set the device, but the problem continues. If you know how to fix Kindle software glitches, this could be perfect for you!