My colleagues have reported this too..It is also not scaling PDFs to fit the sheet using the standard microsoft print to pdf. Leaving a very large border round the drawing.
OK.Thanks Simon - that has been pointed out previously. My comment was aimed specifically at the 'scale to fit' / cropping aspects, not the image quality issue. It isn't entirely clear if different routes do make a difference, we need to find that out.
Microsoft has released Windows Update KB4511555
Add to your list Canon TS 3122 and Canon MX 490 as unfriendly to Alibre