This has happened once or twice in the past. It’s pretty rare, but not unheard of and we can test for it pretty easily even if we can’t reproduce it always on our end.
edited: Removing a test requested earlier. We no longer need server IPs. Thanks for the reports!
Let us know the following for the character having the problem
- Character Name/Realm
- What Instance You Were In
- Time of Day/Timezone it Happened in
That’ll give us more info on when/where we need to test to reproduce things. If y’all can reply back we can give it a peek and try to find out if you’re ending up on the wrong server group for some reason.