Not rendered correctly on Pale Moon with dark theme

[Gordon-Dry]

When using "Black Moon", "Dark Moon" or "DarkPitch" from https://addons.palemoon.org/themes/ the UI looks very ugly and most texts are not readable.
I provide screenshots; have to change the theme and restart the browser multiple times.

[Gordon-Dry]

Black Moon:

Dark Moon:

DarkPitch:

[Gordon-Dry]

"Noia Moon" with option "Black Theme" (can be changed without restarting the browser):

[Gordon-Dry]

Still. Does anybody work on this addon at all?