Setting a transparent window to be resizable breaks transparency #48421
Description
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
38.2.0
What operating system(s) are you using?
Windows
Operating System Version
Win10
What arch are you using?
x64
Last Known Working Electron version
37.2.5
Does the issue also appear in Chromium / Google Chrome?
No
Expected Behavior
Window should still be transparent
Actual Behavior
When setting a transparent window which is not resizable to be resizable again, the transparency breaks and a black area is shown
Testcase Gist URL
https://gist.github.com/t57ser/df9af8f7024137dfaf59de3e7b8909bc
Additional Information
After the window opens, just remove all content via the devtools (delete body) so that the entire window is transparent, after the timeout the area will be black