PySide6 v6.7.0 App-Wide Style Broken

Since PySide6 version 6.7.0 came out, I am having app-wide style issues. I am applying my own style to the PySide6-based app I have, but the style is just wrong.

It's a funny thing that at work I have Windows 11 Pro where my app's style looks different than at home where I have Windows 11 Home, running the exact same code on the same Python version (i.e., 3.12.3) and PySide6 version (i.e., 6.7.0). They both look awful, but a different kind of awful.

If I delete my custom app-wide style and use the default app-wide one, it looks even worse. Then it's some sort of a dark style, but not quite. It's just awful on PySide6 version 6.7.0, whereas on all previous PySide6 versions prior to v6.7.0 (including PySide5 and PySide2), it looks perfectly fine.

Version 6.7.0 of PySide6 must have broken the styles in a capastrophic way. Can you, please, look into this?

(I apply my custom app-wide style by providing a QSS file to the setStyleSheet() method of a QApplication instance.)