Re-posting this list since someone decided to lock the previous thread without anything actually being fixed.
Diablo is experiencing quite a few bugs:
Party Chat : party chat is not working (update, this is working in pubs but not private)
Clan Chat : not working for some still (still not working for everyone)
Groups : Not allowing players to accept invites or send them out. Not allowing 4 users in a game. Receiving errors “This player is a non seasonal character” when they are.
Friends List : Displays player level at 0, displays as non seasonal when they are on seasonal characters. Displays Unknown instead of player class.
Community Chat : Says no one is in
Profiles : Not visible (update, working now for some)
Unable to Change Character : When in a party. (working for some)
Invisible Characters : Some characters are not displaying in Party Menu.
Broadcast : Not working