I use the arrow keys to navigate search results on the desktop. As I move down, eventually the focus stops on the last search result:
Pressing the down arrow from here doesn't move the focus to "More Results". The Tab key moves the focus around and gets me to some other buttons, but strangely, it doesn't get me to "More Results" either. This disrupts my keyboard-only workflow and forces me to click on that button.
I should be able to press the down arrow (or, at least, the Tab key) and move the focus from the last search result to the "More Results" button.
And then, after I press Enter on "More Results", the focus should either move back to the last "old" result or move to the first of newly loaded results (kinda similar to what I express in Click on "More Results" loses the focus)