Single character achieves on alts

Apparently there's a bug involving battlegrounds where you can obtain single character only achievement credit such as Challenge Mode Gold, Deadly Gladiator etc on your alts.

If you have one of these achievements on one character and you queue for a random battleground on another you'll get disconnected. When you log back on you'll have these achievements on that alt.


People are getting Realm First Challenge Mode Gold on character's lower than level 90.

Literally, Log an alt - Queue a bg - Click enter - Profit!