Not only does it start showing everything double once you sign up, it’s also bugged when trying to automatically set up a group (no custom name input) for group elite world quests through the Eye icon under the minimap column. It will simply skip the usual process and throw you to the exact window you see when setting up custom groups. The only way to fix it is to spam reload UI several times until the game shows you some mercy. It’s not an addon caused issue.
Just to be clear, I have an authenticator attached and I’m not locked out of using any features.