Strange Graphical Glitches under KDE

[6XGate]

I have seen a constant issue with graphical glitches when running games under KDE. The main one is that the graphics are render many pixel below the actual title bar. This also seems to result in mouse clicks and interaction that seem to be feeding the wrong coordinates to event handlers, but likely those are right and rendering is wrong. Resizing also causes the graphics to dance up and down by in the client area of the window.

The following screenshot should have the frame touching the title bar. It is positioned at .xy(0, 0).

KorGE Forge 2025.2.1.1 (Fenix Edition)
Build #KF-252.25557.SNAPSHOT, built on September 6, 2025 at 06:35
Source revision: 917b28f78c531
Runtime version: 21.0.8+9-b1038.71 amd64 (JCEF 122.1.9)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.awt.X11.XToolkit
Linux 6.18.7-arch1-1
Arch Linux; glibc: 2.42
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 8192M
Cores: 12
Registry:
  ide.experimental.ui=true
  idea.ignore.disabled.plugins=true
Non-Bundled Plugins:
  com.intellij.plugins.vscodekeymap (252.23892.201)
  com.nbadal.ktlint (0.30.4)
  com.github.copilot (1.5.63-243)
Kotlin: 252.25557.20250906-IJ
Current Desktop: KDE

KorGE 6.0.0
Gradle 8.8
JDK: JetBrains Runtime 21.0.9

GL_RENDERER: 'NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2'
GL_VENDOR: 'NVIDIA Corporation'
GL_VERSION: '4.6.0 NVIDIA 590.48.01'
GL_EXTENSIONS: 401