I have found a solution to my own health bars. It was as I originally suspected. The HUD itself is being drawn by the Character class. I’m not exactly sure why this is causing the problem, but it could be as you said, no controller is assigned immediately.
In order to fix it, you will need to derive a HUD class. Inside of your blueprint, you will just need to cast to your owning pawn and pull the vars you are updating with. My other menus and stuff worked fine (because they were in the HUD class). Moving my health bar to the HUD class, everything updates perfectly, no replication errors.
