Impending Hotfix for 'Ghost Chat Issue'
For the last two days, our engineers have been on the tail of a bug, causing players to be displayed as being present in chat channels after having left them. The issue has been dubbed the 'Ghost Chat Issue' and has been noticed by many.
A possible solution has been found and a live hotfix will be deployed shortly. A server broadcast message will be sent to all online players with further information if needed.
Further information in this thread.