That sounds weird, I mean it could also be that the developer put these updates in that you have to load. It might be worth to ask them what this is?
I mean Stadia basically just gave the developer a platform where they can put their game on and other games didn't have that. I tried Mortal Kombat 11 for example and there were no downloads within the game, I can just start it and play it (as promised).
They already stated they're working with EA to resolve this so it shouldn't happen in the future.
Thanks, would you please share a link to the source of this information?