Please do me a favor, and try this on your raw file:
add 1 step of false color suppression from the raw tab (I don’t have the raw, so I can’t do it on this image)
try a setting like the one below in Defringe:
For some images with a lot of fine color detail, if the Defringe module leads to too much color bleeding, try with Noise reduction - Chrominance only (yes, even if your image is noise free, it will help fighting color artifacts):
In my examples there are some artifacts remaining, that I’m quite confident False color suppression would take care of from the raw file.