Created attachment 159892 [details]
Buggy dark theme in Okular

SUMMARY
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STEPS TO REPRODUCE
1. Settings
2. Color Scheme 
3. Breeze Dark (Or default if Windows system theme is dark)

OBSERVED RESULT
Provided in attachment.

EXPECTED RESULT
A working dark mode with readable text.

SOFTWARE/OS VERSIONS
Windows: Windows 10 Version 2009 (x86_64)
macOS: -
Linux/KDE Plasma: -
(available in About System)
KDE Plasma Version: -
KDE Frameworks Version: Version 5.107.0
Qt Version: Version 5.15.9 (built against 5.15.9)

ADDITIONAL INFORMATION
It worked fine when I installed Okular recently for the first time, but it's been a couple of days (?) since this bug appeared.