Combination of Breeze Classic color theme and Breeze Twillight system theme doesn't work

[major-mayer]

What happened?

I've set up Yin-Yang like this:

As my light system theme, I want to use Breeze Twillight and for the colors Breeze Classic (the one with the blue title bar).
However, as you can already see in the screenshot, the title bar is white and not blue.
I guess the problem is that "system theme" actually sets the global theme in KDE and overwrites the colors, which would explain, why Breeze Light/ "Hell" is now selected in the settings:

It would be nice if there was some way to set the plasma theme and global theme independently.

Version

3.4.5

How did you install Yin & Yang?

AUR

What desktop environments are you seeing the problem on?

KDE

Which plugin causes the issue?

System

What software version do you use?

No response

Relevant log output

No response