I have a specific problem, i use a vendor provided icc profile for a matte paper, and in soft proof in LR the red colors specifically are shown as shifted towards magenta.
What is most likely cause of this magenta shift in the softproof? something wrong in the profile?
Does the vendor allow you to actually use the profile for conversion or just soft proofing? If the later, forget it, you must be assured that the profile is used with the rendering intent you select and those numbers to directly to the printer "as is".