fiddler,
Interesting, I try to keep up with any 4K related issues, since I'm using dual 4K screens here.

Haven't observed any problem like this on my system (specs in signature), but good to keep this in mind just in case!
Looking at the Properties page, for BIAB 64-bit, I do not have either of those high DPI settings selected.
I've always used Windows scaling set to 150% also.
Best of luck,


Jerry
2019 BiaB Megapack (634), RB 2019 (Build 4)
Reaper 5.983 x64, Audient id14 USB interface, Voicemeeter Potato 3.0.0.8, Nektar LX49+, Roland E20
i7-6700K Skylake desktop, 64bit Win10 Pro(1903), 32GB ram, 512GB system SSD + 2TB data SSD