From TechRadar: “A new Xbox Series X update is on the way that addresses one of the consoles most annoying problems: games not launching properly when they require an update.
Xbox Alpha and Alpha Skip Ahead Insiders will now be prompted immediately when an Xbox Series X game needs an update, which means you shouldnt encounter the all-too-common issue that rudely boots you back to the dashboard, or have to launch a game multiple times before the update prompt appears.
Thats a huge improvement over the current situation as it can take up to 15 seconds for the Xbox to show a user that an update is ready and needs to install. The problem, it seems, was that the notification wouldnt show up until the console had determined the size of the update, hence the delay. Now, though, users will be notified that a game needs an update right away, and the file size will follow along shortly.”