After switching from/to Airplay all newly created QWebEngineView are rendered black

Enabling/Disabling Airplay to show the screen content on a large screen using an Apple TV affects the creation of QWebEngineView. The effect is that the content is rendered all black.

Reproduction Steps 1:

1. Turn OFF any Airplay if active
2. Run the attached example
3. Create one or more QWebEngineView using the button
=> everything ok
4. turn ON Airplay
5. try to create more windows
=> all windows created before switch still work
=> all windows created after switch are black

Reproduction Steps 2:
(Close the example app if still open)
1. Turn ON any Airplay if not-active
2. Run the attached example
3. Create one or more QWebEngineView using the button
=> everyhing ok
4. turn OFF Airplay
5. try to create more windows
=> all windows created before switch still work
=> all windows created after switch are black

It does not matter on which screen the windows are rendered. It also does not seem to matter whether one of the screens is in HiDpi mode or not. The problem also happens if the screens are mirrored.