The history screen not only isn't blank but it always shows an entry page with the password in the clear. The page shown isn't usually a page I've visited during a session but this is clearly a serious issue.
Comments: I can recreate the problem consistently now. What I've surmised is that when 'Protect database display' is 'on' the system should display a 'blank' screen rather than the last actual screen - leaving the big question - where does it get this 'blank' screen from? If you let the display time out or you tap the on/off button while Keepass2Android has the foreground, whatever is being displayed becomes 'the blank screen' rather than an actually blank screen. It will use this screen in history until I create another by following the same procedure. The only way to make it use an actually blank screen again is to delete the app from history and switch apps before shutting the screen off (or letting it time out) because any other procedure will capture something other than a blank screen. Hopefully this gives you some clue as to what (if anything) can be done so that what's captured as 'blank' isn't a screen that has a clear password on it. Meanwhile one must be very careful (on a Moto 4G) to be on a menu screen or switch to another app before turning off the display.
Comments: I can recreate the problem consistently now. What I've surmised is that when 'Protect database display' is 'on' the system should display a 'blank' screen rather than the last actual screen - leaving the big question - where does it get this 'blank' screen from? If you let the display time out or you tap the on/off button while Keepass2Android has the foreground, whatever is being displayed becomes 'the blank screen' rather than an actually blank screen. It will use this screen in history until I create another by following the same procedure. The only way to make it use an actually blank screen again is to delete the app from history and switch apps before shutting the screen off (or letting it time out) because any other procedure will capture something other than a blank screen. Hopefully this gives you some clue as to what (if anything) can be done so that what's captured as 'blank' isn't a screen that has a clear password on it. Meanwhile one must be very careful (on a Moto 4G) to be on a menu screen or switch to another app before turning off the display.