UMG 3D widgets showing in-engine but not in packaged build

I have a parent BP with a static mesh, arrow, and UMG widget component added. In the derived blueprints I simply select the instances of those that I want and place them in the world. They show up and function properly. However, when I package the game and run the executable, the widgets are no longer there.

Anyone have any idea what might cause this? I’m not even sure if it has anything to do with the parent/child relationship I described.