Does dynamic toggling of "autohideMenuBar" not work?

Electron 7.1.10, Windows 10

When my app enters full screen, I'm trying to turn off menu visibility and make it "autohide" so it can be accessed through the Alt-key. The code below does turn it off but does not enable the "reveal through Alt-key" behavior.

I've tried commenting out the mainindow.setMenuBarVisibility(); calls since maybe that is absolute: menu never to be shown, but then the menu still displays in full screen. I've also tried changing the order, so that I call mainindow.autohideMenuBar = true before setting visibility to false. No luck.

Has anyone else encountered this?

The BrowserWindow docs seem to indicate that what I am trying to do should work:

win.setMenuBarVisibility(visible) Windows Linux

visible Boolean

Sets whether the menu bar should be visible. If the menu bar is auto-hide, users can still bring up the menu bar by pressing the single Alt key.

    if (mainindow.isFullScreen()) {
        // coming out of full screen
        mainindow.setMenuBarVisibility(true);
        mainindow.autohideMenuBar = false
        mainindow.setFullScreen(false);
    } else {
        // entering full screen
        mainindow.setMenuBarVisibility(false);
        mainindow.autohideMenuBar = true
        mainindow.setFullScreen(true);
    }