Hello,
I just encountered the problem that a crop is kept in PM (build 16765 (2682973) although it is removed in Adobe Camera Raw. I opened a NEF file from my Nikon D750 via PM (STRG+E) in ACR (Photoshop CC 2015, Wind 8.1 x64) and did my adjustments including a crop. The crop rectangle is then shown in the PM preview and thumbnail. I then reopened the picture in ACR, reset all settings and removed the crop. Now the crop is still show in PM (thumbnail & preview) but not in ACR when I open the picture again to edit.
Here's how I noticed it: I synchronize a folder with pictures on two drives. When I remove a crop (in ACR or directly in PM) the file in the corresponding folder on the other drive is absolutely identical in size and timestamp but the crop rectangle is still there. But only in PM. If opened in ACR the picture is uncropped.
Is this a bug, a feature or a mistake on my side?
Regards
Oliver