Since the latest update 2015.8 release Camera RAW 9.8 I have been having issues when I delete a photo completely. The main development screen locks or freezes on the photo that was deleted not allowing me to further edit other images. The small preview screen and the secondary display (when activated) change to the newly selected imate, but not the main development screen. The only way I can get back to Post production work is to restart Lightroom.
I think that I will try a uninstall and reinstall unless there are alternative methods.
This is a known bug in 2015.8. See Lightroom images freeze in develop module.
The solution is to delete photos in the Library, alternatively to roll back to 2015.7.
I assume that this will be fixed in a future update.