qBittorrent v4.3.0 running under Win 10 v.1809. Monitor has 2560x1440 pixels.
The progress gauge is a medium blue bar that expands rightward. The right edge of the bar is a graphical mess: 1 pixel of light blue; 1 pixel of white; 2 pixels of dark blue; 2 pixels of light grey; then the white. This structure stays the same regardless of how much space is allotted to "Done". Allotting moderate space, when I eyeball the gauge I see a greater fraction undone than is true -- sad for the downloader. Something is wrong with graphical programming of the gauge bar end.