I think this is a recent one. For me anyway.
Every now and then. When I'm talking with someone, or send them a tell.
I'd get this as a response from the game:
But I can still see their character standing in front of me.
Though, they're not online when I search for their name either.
I can still view their bio perfectly fine.
And it seems to only happen some of the time.
I think it might happen if their game crashes, or they simply press X in windowed mode.
Since then it might not close properly. And send the necessary info to the server.
But I think think this was a problem before, as I've never encountered this until recently. Not sure how recently though.
Comments
Epic Stronghold
Block timing explained
And sure, it would make sense if the character didn't despawn for 30-60 seconds.
But this character I stood next to, he was there for at least another half-hour, before I left to do something else. :P
Epic Stronghold
Block timing explained