Windows 10 Home 1903, Designer 1.7.1.404.
Some people might think this as being too picky but others might think it is a major problem for them so I’ll report this as a bug and see what happens.
The attached GIF shows the problem much better than I could explain it. Watch how the dashes on the curve change shape. Sometimes they’re fine but at other times they look really bad. Modifying the curve or zooming in/out alter how the curve is drawn.
This bug report comes from this forum thread: https://forum.affinity.serif.com/index.php?/topic/95564-minsk-tramway-incl-metro-transit-diagram/
line-with-dashed-stroke.afdesign