Does 'Standalone Game' normally open a black windowed box for everyone?

Hi all. I’m using UE5.0.2. When I click Standalone Game, it opens a black box for about 10 seconds, then launches the main menu of my game. I am wondering if this is normal, or if I might have to fix this.

Additionally, I am using Async Loading Screen from FAB store, and I set it to play an Intro Movie. When doing Standalone Game with this plugin enabled, the Intro Movie also plays in Windowed and then jumps to FullScreen as soon as the intro movie is finished.

I just want my game to be bogstandard, normal, classic and open / launch / play in FullScreen mode for everyone so want to ensure this is normal.

Thanks!