Updated to #NixOS 25.11 and #Plasma 6.5. All issues fixed, and I love Plasma's improvements. #EasyEffects got updated to version 8 in the process, it's quite a big improvement too: now we got a built-in tray icon and a better integration to #KDE due to the rewriting of the interface in Qt/QML/Kirigami instead of GTK4. All good!