With blur effect turned on, plasma applets lose their dark backdrop, while the blur itself appears to work normally. Corners of applets and panels have wrong colors
Lack of background may cause text to become unreadable:
The problem is not present with blur effect turned off, but turning blur effect off introduces another issue - wrong scaling of corners, which doesn’t happen with blur effect turned on
Only with Breeze and Fedora plasma styles have broken background in applets, Oxygen plasma style doesn’t have broken backgrounds, but it has improper scaling of rounded corners in applets. The problem persists with and without the proprietary Nvidia drivers. But it isn’t present when running Fedora KDE (not Kinoite) on a live usb on the same computer, so this is probably the issue with my particular installation of Fedora Kinoite instead of a Plasma bug or incompatibility with my system. I guess that the problem may be in config files, since this Fedora Kinoite was rebased from Fedora Silverblue, though the issue with broken blur effect started happening long after the rebase.
Output of rpm-ostree status:
Deployments:
● fedora:fedora/43/x86_64/kinoite
Version: 43.20260224.0 (2026-02-24T01:14:33Z)
BaseCommit: c01eaf144e68ef5fdbea80d00851910a906cca37b2d637801f0332aa23fca9cd
GPGSignature: Valid signature by C6E7F081CF80E13146676E88829B606631645531
LayeredPackages: akmod-nvidia android-tools arc-kde-kvantum btop crystal-dock dillo distrobox
dvdbackup f3 fcitx5-mozc gamescope gdal google-noto-fonts-all inxi
kcm-fcitx5 kvantum libmad libreoffice-calc libreoffice-help-en
libreoffice-impress libreoffice-kf6 libreoffice-langpack-de
libreoffice-langpack-ja libreoffice-langpack-kk libreoffice-langpack-ru
libreoffice-writer materia-kde-kvantum nu oxygen-fonts oxygen-gtk2
oxygen-icon-theme oxygen-sounds plasma-oxygen proj python3-gdal python3-pip
qrencode rclone steam waydroid xorg-x11-drv-nvidia-cuda zbar zerotier-one
CPU: Intel Core i5-12400
GPU: Nvidia GeForce GTX 1650