Top level QWidget reappears unexpectedly after display setting changes

We have a use case in our application where two windows are shown in a toggle-like manner - displaying one window should hide the other window and vice versa. However, we've detected an issue where a supposedly hidden window reappears when we switch to the other window and alter the display settings on the current monitor to either a higher or lower resolution.

Steps to reproduce:

1. Open the application.
2. Maximize the application window and switch to the other window.
3. Change the current monitor's display settings to a higher or lower resolution.
4. Note the fatal error message.

Expected Result:

The originally displayed window should remain hidden when display settings are altered.

Actual Result:

The supposedly hidden window reappears when the display settings are changed.

Impact:

This is pretty critical issue for our product as we end up seeing a supposedly hidden window and could cause stability issue. While its easier to detect this programmatically (by listening to WindowActivate), solution for this would involve a considerable amount of hack thats not scalable in long run. Hence needed an official fix from Qt.

Note:

• This issue doesn't happen on macOS in our testing.
• This issue could also happen when waking the system from sleep while the window is in an unmaximized window state. However, this use case is reproducible only on certain machines. 
• This was tested on Windows11.
• qtbug-123929.zipattached to reproduce the issue.