Upgraded our software from version 1.3 to 1.45, I'm still not sure what was causing the chat problem before, but this has seemed to fix it.
Version 1.45 brings in multi-user chat/PM's, so have fun messing around with that! (click "settings" in a chat window to bring someone into an existing chat). There should be a few other UX upgrades too, mostly on mobile.
Styling / CSS is looking a little funny, so I'll be looking into that. Let me know if you you see any weird behavior that could have come from the version upgrade.