Just like everyone else here having disconnected characters, clicking items and buttons wouldn’t/syncing up, not being able to loot, being able to chat in game and move but nothing else, etc.
I thought it could be service lag so I restarted WOW client and now the characters are unable to log in and keeps saying “Name already exists.”
Was able to log into another character and the in game support just loads constantly. Was trying to access the Stuck Character Retrieve portion.
Definitely a WOW client issue.