I can't reproduce. I wonder, might it be a refresh issue? E.g., if you try to resize the whole window, or on of the sidebars (Tree or Now Playing), does it have any effect?
In addition, where there is a collection of hundreds or thousands of tracks (as shown by the total at the bottom) only the first 21 or so are shown and the scroll bar is at the top. Scrolling down can be done, but after the first 21 no actual tracks are shown
Are you able to 'fix' the issue by resizing either the main window, or e.g. the Now Playing right side bar (which changes size of the main view, where the playlist is shown)?