Interesting.
I am wondering if this scaling included the width.
Can you please help checking with more different resolution?
(Honestly my Mac image is not completely ready...Strange VM Tools)
Something like width=800, resolution=1920X1280...etc
I tried some more that someone suggested in another thread.
Here's the links to my posts:
https://forums.macrumors.com/posts/15424799/
https://forums.macrumors.com/posts/15425375/
https://forums.macrumors.com/posts/15427551/
I can give some more a try tonight.