There's been this weird bug of late since approximately 2-3 days ago where there are people on my guild appearing online but when you try to trace where they are (such as which channel or which map) it comes out as unable to find character. The guild alliance tab hasn't been fixed yet so I'm not sure if it applies to it but this issue isn't seen in the buddy list tab.
Yep. My brother and cousins character were logged on last night although they logged off. They couldn't get back in because of it. Even after using character fix they were still unable to relog due to their character being stuck "online"
What message were they getting when attempting to login? I'm pretty sure the bug OP is reporting is the bug that characters are not logged off if the client disconnects while the character's request is being handled by the part of the server that handles character logon and channel switching. Perhaps the character sessions get stuck in a queue until some other method gets them unstuck. @Sila, my character was stuck like this but it got unstuck when I logged back into it.