It is not easy to view chats and work on a document simultaneously. I can't say how many times I've had to close the document I'm working on to go to a team chat, to respond to something, then spend five minutes getting back to the file to start working on it. I don't know how you fix this per se, perhaps be able to have multiple "tabs" open or perhaps be able to do split screen, or maybe be able to pull the chats up as an overlay that we see with HTML5 so often, all of these might have potential... But it is extremely annoying closing a document and finding a chat and then having to refind the document, even a quick flip or toggle between active sessions wouldn't be a worst idea... TVs have PiP (Picture-in-Picture), so do many websites now, that's not a bad idea either.