Workout Mode Avatar HUD Color

Why is it that the avatar hud color in workout mode does not correspond to the main screen graph color (power) at bottom of screen when changing workout ftp bias?

The graph at bottom of main screen seems to reflect the correct power zone color when changing ftp bias but the rider or avatar hud does not change and reflects the interval color as though bias was still set to 100%. (note: I think the interval arches also reflect 100% ftp and do not change color with changing ftp bias).

I find this to be very annoying.