I just noticed that the text in the new design collision dialog is truncated, as seen below, which made me investigate the old design dialog only to discover that it has always been truncated (middle image) but it wasn't as obvious, you can see the complete text in the old dialog in the bottom image after manual enlargement. I am running 1920x1080@120dpi, using font Segoe 9.
Top image from 20.60, bottom 2 shots are from 20.20 just for comparison.
Old version, top is default display, bottom manually enlarged.
Easiest way to invoke this dialog is renaming 2 files in the same folder to the same name.