Hello, some problems with NR not applied if image size < 1/3 of original were apparently solved in 5.2, but in some cases NR is still not applied. Please have a look at attached images, they are both exported with exactly same settings, the only difference is, that there is a crop applied on cropped.jpg version. Please notice the difference in overall noise. Please solve this problem as soon as possible, this has a big impact on image quality if higher ISO is used.
Please contact me, if original NEF or XMP is needed. I can reproduce the problem. It seems, that it appears only if some specific crops are used.