I cannot flag, rate, or color label photos in a slideshow. When I use the keyboard shortcuts a message flashes on the screen that the rating has been applied, but when I return to grid view, only the first photo in the slideshow has had any ratings or labels applied. This is in Lightroom 6 running on Windows 8. I have seen the same bug reported for Lightroom 5 and apparently it still is not fixed. In addition to the tagging not working, the space bar, arrow, and escape keys do not work as intended.