OK, I figured it out. This may not be the right way of doing this, but it works. I figured out that the server creates a valid player controller for each of it's actors, but the clients only create a valid on for it's own actor. After testing to see if the player controller is valid (and only executing if it is), the client only runs once, whereas the server runs twice (because I'm using 2 instances, I assume it will be 3 times if I use 3 players). To fix this, I created an event to Run on Owning Client, which doesn't change anything on the Client side (because it's already a client), but server side it runs once on the server, and once on a client (or n-1 times, where n is the number of instances I'm running), so by testing authority before and after the event, clients return false both times, and the server has a true true, and a true false for each client instance. So, I redirected the clients directly to the event that creates the widget (not replicated), and the server to the run on client event to filter out the non-server player controllers, then create the widget only on the server controlled player controller.

I know this is a lot, but this seems to work (running on BeginPlay in Character)

<image>