i noticed that when in camera app if you open any menu there is a bug on the buttons
its like they have a line of little holes in them and you can see through them what the camera sees underneath them so to speak...
i hope i explained correctly... anyway the in-camera-app-menus, thats the place!
thought it would help
i use deep purple

edit:
i just updated to 2.104
holes are still there
i had the previous ver. when i first posted