Two immediate issues are instant RP points being hidden and part of the display options when scaling down UI.
The UI scaling and the font size usually have to be modified together to work as expected.
I had not done any testing with anything below 1.0 1.0 in UI scaling (I'm using the setting to blow everything up on my 4k monitor).
I just tried with 0.8 0.8 and I needed to drop the font size to 6 to get normal-looking layouts.
If you send me your config I can take a look, but I suspect there's not much I'll be able to do that won't break something else in another UI/font configuration mix.