The console command bugscreenshot doesn't work correctly in stand alone or packaged games

The console command bugscreenshot doesn't work correctly in stand alone or packaged games. It screenshots the UI and leaves the rest transparent. This is different behavior from PIE, New PIE, or just running the command in the editor without playing. This isn't a regression.

1. Create or open any project
2. Play in Stand Alone
3. Press the ` key to open the console
4. Execute the command bugscreenshot
5. Navigate to <project>/saved/BugIt/WindowEditor

Expected Results:
A screenshot showing the Stand Alone game is created.

Actual Results:
Only the UI elements are visible the rest is transparent. This is different behavior from PIE, New PIE, or just running the command in the editor without playing.