I don't know why it does this, but it's been doing this for the past week or so. Continuously. No matter how many times I start or restart the game.

• Friends List tells me I'm offline
• Friends List tells friends I'm offline
• Can't receive or send out invitations
  • Can accept invitations when they're already present at game start (previous session's invite)
  • Can join open parties, but doesn't show me that I'm joining them, they do see it
• Can't accept friend requests (button changes to "accepting", then gets stuck for a while, then goes back to "Add friend" or whatever)

After finishing a match, my status is either "offline" or "in game" and that won't change until I restart the game. After that, though, I run into the above problems all over again.