Rendering artifacts for titlebars with blur enabled

[v1rtl]

there is a weird line covering the rounded corner

System Info

Desktop: KDE Plasma v: 6.4.5 tk: Qt v: N/A info: frameworks
v: 6.18.0 wm: kwin_wayland with: krunner vt: 1 dm: SDDM
Distro: Garuda base: Arch Linux

KDE Settings

Window Decorations: Klassy Breeze preset -> border radius is 8px, same as on LightlyShaders
Application Style: kvantum-dark
Desktop Effects:

• Blur (LightlyShaders)
• LightlyShaders

I have display scaling set to 125%