Adobe Camera Raw, both in Bridge CC2017 and Photoshop CC2017, has started to omit portions of an image after an adjustment. Or it presents the upper left quadrant of the image in the lower right. Or similar strange behavior. Left clicking on the presentation snaps the image back to what it should be. I've purged caches but the behavior continues. I moved from Photoshop CS6 to CC in December of 2016.
In Photoshop CC you can switch on the GPU (graphics card) to do part of the calculations. You can switch it on or of in the ACT preferences pane. Try if changing this setting makes any difference.
I have been using Graphics card all along. It is Nvidia GeForce GTX 745. I also have 16 GB of RAM. My CPU is Intel i7-4790. OS is Windows 10, 64-bit. ACR has always worked well until a couple of days ago. I made no deliberate changes to settings.
Why don't you just try?
Sorry, I didn’t take in the “off” part of your first note. Yes, I will try turning the graphics card off.
I turned off the Graphics card. Processed half a dozen images in ACR with no instances of flaky behavior.
ACR developed the flaky behavior while GPU was being used. I’ve turned it off and processed several images with no problems occurring.