Whenever I get a chat from someone, I can hear the notification and I can see the blip on the bottom of the screen showing me that a player has sent me a message. However, upon clicking their name to open the chat, nothing happens. The only time you can open a conversation, at least on my end, is by clicking someone's name on my friends list and then clicking the chatter's name afterwards.
https://gyazo.com/45ebfb59000b81a9452a4630c6ec5f8d
^ A video showing what I described. When I scroll over Meliva's chat with me, I am clicking with no response.
Additionally, the names of people I chat with via this service sometimes overlap each other instead of spreading out into separate spots on the chat bar.
https://gyazo.com/e59bb0f9ec2267fd373f20d12f60a4dd
^ A video of the names getting out of order, misplaced, stacking, etc. It happens with as little as 4 people, but I used more in this example to show some more bugs with it.