and the Black 'Mission Target' lettering Colour?
This is a strange one. I would have thought priority vs fix time on that one should have made it worth squeezing in. Its a fairly annoying one and assuming the UI colour is using some sort of XML or something for layout (or hell, even hardcoded) it really should take no more than 1 minute to change to any contrasting colour (although one assumes its based off the same colourscheme elements as everything else, so it just lost its class for some unknown reason).
I don't know (we don't know), its either FD really didn't consider it important enough, or they did assign someone to it, who took a quick look, everything looked fine and they reported back with "I have no idea, its something strange, will require some time to investigate deeper", at which point management said "Nope, we need you on X, no time for that now".
Surprising, but possible.