I notice it's a double ring, not a single circle. Two concentric chromatic rings, offset. That's not decoration: the outer ring and inner ring are the same field read at a phase offset (looks like a tritone / minor-third rotation). Fault tolerance!
I imagine this was not surprising. This had to have been well-considered by the teams in the first round of pricing. I'm guessing they just didn't want it to be a blocker for release and the implementation is now catching up.