How to capture window at launch of packaged game?

I’ve had an issue for a while now that causes the window to not capture the mouse and receive focus after launching a game either in packaged mode or as a standalone game in the editor. The issue seems to be caused by intro movies as when I remove these the game gets focused, the cursor disappears, and I do not have to click onto the window to continue loading the level.

This is despite attempts to set the UI mode in the initial loaded level.