Wallpaper and Lock screen wallpaper:
I have the latest Android 8.1 update, but even before that I set the wallpaper to an on-device dark picture with stars. Quite randomly the phone changes to another lighter picture, and sets the lock screen to black. This seems to be a problem with older versions of Android as well
The lock screen keeps losing all the emergency contacts I have provided (3). I have eventually put my wife's number in the medical notes.
Safe area at home:
I have told the phone not to lock itself when I am at home. I keep the GPS on all the time, but most of the time the phone locks itself at home.
Where do I report these bugs? Are there known fixes?