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.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-40276 in the post.