So maybe I'm just dumb, but I've been playing multiplayer and chat isn't working for me. I see everyone else's in game chat, but when I hit Y and type something in, it just doesn't ever appear in the chat log. I have no idea what's up with it.

Yeah, I'm having the same issue, like just sound comes off and nothing happens. Funnily enough, if I host a game, I can see my own text. Have you found a fix for that issue?