Grey windows using QT-Webengine when managing windows through accessibility

When using a window manager like yabai or amethyst when having more than one window it becomes grey. Both use the macos accessibility API to implement the tiling window feature. Resizing sometimes does help. It is illustrated for example using qutebrowser. Or the attached `test.py`.

See also the issue I created at this project.

I also attache a screen recording of my minmal python example. As you can see it works after putting it in "floating" mode and resizing it with the mouse. But as soon as the window is managed in a tiling layout it becomes gray.