To demonstrate:
Re-applying the colour scheme remediates it, for a few days:
My Environment
Operating System: Fedora Linux 43 KDE Plasma Version: 6.6.2 KDE Frameworks Version: 6.23.0 Qt Version: 6.10.2 Kernel Version: 6.19.6-200.fc43.x86_64 (64-bit) Graphics Platform: Wayland Graphics Processor 1: AMD Radeon RX 5700
