Re: Chat is broken, possibly a bug

I haven't come across this issue myself, but my friends who play with me are always dealing with not being able to see anyone else in chat just like you.

I heard someone say before that this occurs if you are in a party but are not the party leader, but I'm not too sure about that. 

Regardless I can say confidently that you aren't the only person dealing with this and I hope that it gets fixed soon.