Title bar rendering artifacts when on Wayland

[talentlessguy]

This is an example of rendering without any artifacts

This is using SierraBreeze - Plasma style:

This is also SierraBreeze but with Force Blur Kwin effect disabled:

This is my SierraBreeze config:

I'm using Utterly Nord Plasma theme globally, except Lightly for Application style (lightly-kf6-git on AUR) and SierraBreezeEnhanced for window decorations. I use ForceBlur for blurring.

System info:

  Kernel: 6.8.7-zen1-2-zen arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc avail: acpi_pm
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
    root=UUID=d1695d0d-ce77-48a1-a2e8-06f69f728c1d rw rootflags=subvol=@
    quiet resume=UUID=381f4cb7-d4c4-4489-90b2-c02278454c6e loglevel=3 ibt=off
  Desktop: KDE Plasma v: 6.0.4 tk: Qt v: N/A info: frameworks v: 6.1.0
    wm: kwin_wayland vt: 1 dm: SDDM Distro: Garuda base: Arch Linux

Additionally, my Lightly config is this:

[kupiqu]

The "triangles" that appear at the bottom are not supported by the upstream Breeze theme, so this could be an upstream issue.
However, the artifacts in the title bar seem to be a bug.

[talentlessguy]

@kupiqu thanks for responding

is there any additional info/tests I could provide to help?