windows 10 1809 explorer dark theme some folder text is still black

I have switched to the theme 'Windows', but that did not change the behaviour (at least of an existing installation). I have set the theme to a pre-defined one ('Flowers').

The OS on the machine in question is a Windows 10 Pro, up to date, as Windows claims. When following the same steps using the Eclipse 2020-06 Java package, I end up with proper white-on-black text items. I have reproduced this on a second Windows 10 machine with no prior workspace or Eclipse installation.

Selected items are black on dark, as in the screenshot above.

Open preferences, search, e.g., for font, select top item.

In market place, select DevStyle and install (tried both only the required item, and the required plus CodeTogether bundle), restart, select Dark Theme.

Install with either Java 11 or 14 (tried both) to some new folder deselected desktop and menu entry creation.

Download the 64 bit Eclipse IDE 2020-09 installer or the 2020-12 one (also tried downloading & unzipping the 2020-12 Java package).I can invariably reproduce the problem with a fresh installation on a new, empty workspace: classpath and setting it up again from scratch (but in vain). I have also tried removing the workspace. Changing the theme to something light and back to dark has not helped, neither has setting 'Force Colors', nor uninstalling and reinstalling DevStyle.

Unfortunately, I cannot seem to find the relevant setting. I first noticed the problem using DevStyle, but on further examination it appears to equally apply to the native Eclipse 'Dark Theme' as well as the 'Spectrum (1.0.0)' plug-in. Ironically, it also shows in the 'Colors and Fonts' selection dialogue: With Eclipse 2020-09 as well as 2020-12, the Eclipse dark themes have a problem on my Windows 10 machine: Selected entries in many tables and dialogues, e.g., variables in the debug perspective, are black on dark.

Windows 10 1809 explorer dark theme some folder text is still black