Longstanding group bug(s)
 

It seems if a group is created before you zone into a zone, and then are invited, you cannot speak in group chat.

Also, I haven't figured out what causes this one but a fix to the other problem would probably fix this one too. Sometimes a person will not show up in the group but you'll be able to see his group chat and it will appear to him he is in the group. Disbanding the group and re-inviting fixes both of these problems.

Thanks.

Yes. The second one occurs especially if someone disconnects and returns. Sometimes, depending on the nature of the disconnect, the server may not pick up on things and disband them from the group properly.