The color of the border in the bottom of the panel is very bright. I think it should be darker or may not be present when a maximized application gets the focus. Reproducible: Always Steps to Reproduce: 1. Set the theme Breeze-Dark. 2. Plasma panel put on top. Actual Results: A border is displayed at the bottom of the panel with a color that bothers according to the color used for the issue of KWin.
Created attachment 99957 [details] Screenshot
I can't reproduce this anymore, I'm only seeing the panel shadow, no white line.