So I just had High Reaver Damaris pop. I created a custom group in group finder. People joined, enough to become a raid. I invited one of my alts. Somewhere in this the rare just disappeared. It actually looked like the whole raid just up and joined another shard. RIP rare dune spawn.
This crap is broken.
Just had this happen again. Created a group for a Revendreth rare. Someone else joined and we all shifted shard. That shouldn’t happen.