Created attachment 154907 [details] Screenshot STEPS TO REPRODUCE 1. Delete "~/.cache/" and re-login 2. Set theme to Breeze Dark in Quick Settings 3. Display notifications OBSERVED RESULT Please see the screenshot: On some dark background I see "Korners". For the 2nd notification, there's also this weird arc on the right side. SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20221226 KDE Plasma Version: 5.26.4 KDE Frameworks Version: 5.101.0 Qt Version: 5.15.7 Kernel Version: 6.1.0-1-default (64-bit) Graphics Platform: Wayland Graphics Processor: AMD Radeon RX 580 Series Scaling: 2.0
Created attachment 154908 [details] Screenshot: Notification, Download finished. The bug is no longer visible, once the notification shows that the file download finished.
I could observe the same corner issue on Fedora 37.
This should finally be fully fixed in Plasma 5.27.