Using the Dark theme. Problem is, when I press the Start Button and start typing anything, it all turns bright (white/light gray). Issue is described perfectly here:

How to change color of search menu in Start to black?

I tried the suggestions there (region change / registry) but they didn't work. It seems, only enabling a High Contrast theme can change this but it's an overkill workaround.

Any ideas? Thank you.

(Windows 10 1903 x64 Pro)