Translucent JCEF Window Bug for A Hosted Plugin

We have a user reporting a translucent background showing content behind it with our plugin.It is a Visual Studio Code Extension running in a Plugin. We cannot repro this on physical or virtual machines. I personally tested this plugin under macOS and WIndows, all 12 IDE’s and I have never seen this. They claim not to have any Windowing modification tools running.

IDEA 2025.2.2 worked fine, upgrading to 2025.2.3 caused it to become translucent.

(See attached image)

OS: WIndows 11
IDE IDEA 2025.2.3
JCEF: Runtime version: 21.0.8+1-b1038.72 amd64 (JCEF 122.1.9) VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Plugin: Kilocode for Jetbrains - https://plugins.jetbrains.com/plugin/28350-kilo-code
Github: GitHub - Kilo-Org/kilocode: Open Source AI coding assistant for planning, building, and fixing code. We frequently merge features from open-source projects while building our own vision. Follow us: kilocode.ai/social

Thanks for any cause suggestions or testing ideas.