4.2.0 beta1 SDK and F7 System 6 Preview device.
I have an app that turns on the flashlight, and I notices with FLASHLIGHT_COLOR_WHITE. nothing shows for the flashlight on the bottom line of the sim, while FLASHLIGHT_COLOR_GREEN and FLASHLIGHT_COLOR_RED show. I think the issue is the icon for white is white, so doesn't show with a while background. See the next post for how red looks. When white, the 50% shows correctly, just that there is no image.
Update: With white there is a minor difference between while and the background and now that I know that, I can kind of see it, but maybe there needs to be something like a black outline to make it more visible.