March 16th Bug
I have found it happens with guild chat-you get the message “You are not in a Guild”. As a Guild Leader this is problematic however, mapchat informed me of a temporary fix. Go to your contacts panel. mark yourself INVISIBLE and close panel. Re open panel-mark yourself ONLINE and close out panel. This fixes the issue for the toon you are logged in on. If you switch toons, rinse and repeat for each swap.
didnt work i appreciate the info though