SUMMARY When opening the Application Dashboard and some other applets, a grey box appears instead of a separator, e.g. "Favourites", "Applications" and so on. Started occurring with the release of Plasma 5.23.3 STEPS TO REPRODUCE 1. Open Application Dashboard 2. Also affects applets such as Volume Controls in the System Tray. OBSERVED RESULT Grey box under headings. EXPECTED RESULT Either a line, or some kind of invisible separator. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 5.15.2-arch1-1 KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Affects X11 and Wayland.
Was a cache issue. The following command fixed it: https://www.reddit.com/r/kde/comments/quuqhc/weird_looking_slider_knobs_in_kde_volume_and/