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 feature request that matches the one I want to file, without success.

Electron Version

14.0.0-beta.12

What operating system are you using?

Windows

Operating System Version

10.0.19042 Build 19042

What arch are you using?

x64

Last Known Working Electron version

13

Expected Behavior

Window should be transparent

Actual Behavior

Open a window with transparency enabled and delete the dom, the window will be white instead of transparent.
Also seems like settings the backgroundColor property has no longer an effect. I always see a white window

const {app, BrowserWindow} = require('electron')
const path = require("path");

function createWindow () {
	const mainWindow = new BrowserWindow({
		transparent: true,
		frame: false,
	})

	mainWindow.loadURL('https://example.com')
	mainWindow.webContents.openDevTools()
}

app.whenReady().then(createWindow)

Testcase Gist URL

https://gist.github.com/e124340107f6c4a3ade8b36d98a16b9a

Additional Information

No response