Cannot invite someone to group whose name is the same as the start as an existing member's name. For example if group contains Skippy and Fippy, you cannot invite Skip to group. The invite will go out and Skip can click join, but it does nothing. This also applies to raid window, although in that case it will completely bug out the group. The raid window will show Skip in group, but he will see nothing in his group window and will not receive group buffs or songs, and any people added later will also be bugged. Of note, if the invites go out the other way, everything is fine. So if Skip and Fippy invite Skippy there is no issue.
This is a duplicate of https://forums.daybreakgames.com/eq...ning-groups-with-similar-player-names.270001/. Please upvote that to raise its priority.