Panel - Background setting doesn't seem to work (Better CtrlTab)

Panel - Background Setting: light-dark(rgba(144, 144, 144, 0.94), rgba(22, 22, 22, 0.92))
What appears: 

<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/54d36433-bb33-4e03-aadb-6a2c3b9f393e" />