Game Mechanics: character bug after patch

[alsa]

I have ran into a few "bugged" players after the patch. they will not show up on /who <their name> all. And even if you add them to their friend list, it will appears that they are offline. You cannot send them tells, it will appears that they are offline.

However, soon as they send you a tell. You can then reply to their tells, and after that they will even show up on /who all. I know there's the bug that bugs players so they cannot send/receive tells till they relog. This however is something new. Don't know if anyone else ran into it.