There might be an issue with a ridge or tear appearing on the green around some difficult pins. They are typically deep enough to cause a noticeable effect on the putt.
Designers can't see any mesh changes or unevenness near the holes in their work. These ridges don't appear on the green when other pins on the green are selected.
I've seen this happen a few times during beta testing at OGT. It seems to happen when CF cuts the hole into the green. I don't think this is a smoothing issue. These ridges look almost exactly the same every time they appear on different courses.
Lo and behold, it appears on the newest official course.
Here's the difficult pin (pin 0) on Royal Troon hole 9: