After I finish processing my photo in PS I always go to Lightroom and then export JPG, then I change to BW and export JPG again, sometimes I also change crop and export again. I always use "Export with previous" for that. And it was working for years.
Now it doesn't work correctly anymore.
For some reason "Export with previous" export different photo - not the one I have opened in Develop module.
I tried deselecting everything then select again, but still Lightroom export same photo as on first time.
I tried exporting with "Export...", it works. Then I tried "Export with previous" and again it exported the same photo as in the beginning (not the last one!).
Was behaviour of this function changed in last Lightroom versions or is there a bug?
Sounds like you need to reset preferences: Hold Alt down in the General tab of Preferences (Edit menu on Windows) to reveal the 'Reset all preferences and relaunch' button. Usually I'd screen shot the current preferences so I can get back to where I was.