I just installed the latest Manager on a brand new machine with windows 10. By brand new I mean literally brand new. Manager is the second application I Installed after Firefox.
Probably a font issue, or checj font settings with windows. They have a “tint” or something that maybe will fix your issue. And read those post, because I also feel they are related.
That shouldn’t be a problem since the font selection should fall back to the next in line. On windows you should at least have Arial.
I think this is the key to the solution
I remember a setting that’s burried way deep down the control panel that fixes font issue for new machines. I think it’s labeled “calibrate monitor” or something like that.