I was wondering if it was intended to work that way :
Toon A and toon B zone in instance, kill some mobs.
Toon B logs and raid disbands.
Toon A decides to invite toon C in the raid (who is still outside zone) so they both can keep killing there.
Raid inviting through zone doesn't work, and if toon A zones out, invite toon C, it works BUT, when toon C zones in VT, he is in a different instance.
Would be cool if toon A wasn't forced to completely zone out and thus, restart the whole CY cleaning.