Steps to reproduce:

1. Build the attached project with GLCore graphics API
2. Run the game in 'Windowed' mode
3. Select the possible resolution (e.g. 2880x1800)
4. Click on the 'Fullscreen' checkbox to switch to fullscreen mode
5. Notice the rendering gets broken:
- in 5.4 parts of the menu are still rendered and interactable (Note that sometimes it doesn't happen on first try, so you might need to switch between Windowed and Fullscreen a few times to see the issue)
- in 5.5 the screen turns black every time you switch to fullscreen. Switching back to Windowed fixes rendering.

Not reproducible with: 5.3.6p6