Unable to make the Standalone Game window fullscreen with a console command or with Alt+Enter.
This is a regression as this was not an issue in 4.14.2.
Setup:
Have access to templates.
Repro:
Expected Result: The Standalone Game window goes full screen.
Actual Result: Standalone Game window does not change.
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UMG RichText not appear image when packaged
What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-40276 in the post.