When viewing music collection’s in track view mode, after clicking on the header an alphabetic list appears down the far right side of the track list which blocks out the 3 vertical dot drop down menu (play next etc), this list doesn’t appear for collection’s smaller than the length of the screen.
You can actually get to the menu, even though it’s hidden. Just place your mouse as far to the right, but still within the list item area, as you can. You’ll see the ‘pencil’ icon dim. At that point, clicking will open the Additional Options menu.