Lightroom :: Greyish Red-tones In Version 4 / 5?

while processing images from a wedding, I stumbled about a weird color bug on a handfull of images in three different situations with CR2's (Canon Raw) Red-tones especially on lips and edges appear to be grey instead of red and orange.
 
I usually use a standard import preset, however, I completely zeroed everything out, and the mistake still occurs in Lighroom. However, in RAW-Therapee are all the colors just fine when zeroed or edited.