Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

Electron Version

38.3.0

What operating system(s) are you using?

Ubuntu

Operating System Version

Ubuntu 24.04.3

What arch are you using?

arm64 (including Apple Silicon)

Last Known Working Electron version

38.1.2

Does the issue also appear in Chromium / Google Chrome?

I don't know how to test

Expected Behavior

The window maintains a default shadow with property titleBarStyle: "hidden".

Actual Behavior

As of version 38.2.0 , adding property titleBarStyle: "hidden", causes the window shadow to be lost in Ubuntu. I have verified this issue persists in 38.3.0.

Testcase Gist URL

https://gist.github.com/HillaryManning/bc4c0d6ed6f1d93291f9334df883ce70

Additional Information

No response