More often than not, the server name displayed in the top right of the Tab does not display Hub on the Hub server. This issue may be due to the fact the Hub server has the master configuration for the Tab plugin over the network.
Reopened. This issue still exists, the issue occurs if the Hub server is started before or after any other servers, the Hub server needs to be turned on at the same time as another server (for some reason). I noticed this yesterday when I restarted the network however that was just lucky.